Divisor function | Integer sequences

Weird number

In number theory, a weird number is a natural number that is abundant but not semiperfect. In other words, the sum of the proper divisors (divisors including 1 but not itself) of the number is greater than the number, but no subset of those divisors sums to the number itself. (Wikipedia).

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Awesome Number Pattern 1

Exploring an amazing pattern that forms when we multiply numbers built only with the one digit

From playlist Number Patterns

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What is Special About the Spelling of Odd Numbers?

This video explains what is special about the spelling of all odd numbers.

From playlist Mathematics General Interest

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Why Are Prime Numbers So Weird?

No matter how much or little math you know, you must have come across prime numbers and asked yourself: "Why are prime numbers so weird?" 0:00 Why are prime numbers so weird? 0:17 They are unintuitive 0:52 Challenging their unintuitiveness 1:13 What are prime numbers? 1:38 Unconventional

From playlist Summer of Math Exposition Youtube Videos

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What are imaginary numbers?

Imaginary numbers are any numbers that include the imaginary number i. A mix of imaginary and real numbers gives you what’s called a complex number. The primary reason we use imaginary numbers is to give us a way to find the root (radical) of a negative number. There’s no way to use real

From playlist Popular Questions

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What are Imaginary Numbers?

We discuss what imaginary numbers are and how they are part of the larger set of complex numbers in this free math video tutorial by Mario's Math Tutoring. This is a nice introduction to working with i. We also go through some examples. 0:26 A Hierarchy of Different Types of Numbers 1:03

From playlist Imaginary & Complex Numbers

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Tutorial - What is an imaginary number

http://www.freemathvideos.com In this video playlist you will learn everything you need to know with complex and imaginary numbers

From playlist Complex Numbers

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Ex: Linear Equation Application with One Variable - Number Problem

This video provides and example of how to solve a number problem using a linear equation with one variable. One number is a multiple of the other. The difference is a constant. Find the two numbers. Library: http://mathispower4u.com Search: http://mathispower4u.wordpress.com

From playlist Whole Number Applications

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Dividing Complex Numbers Example

Dividing Complex Numbers Example Please Subscribe here, thank you!!! https://goo.gl/JQ8Nys

From playlist Complex Numbers

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MA 15 Gerrymandering detection: Isoperimetric Quotient

This video is for my Spring 2020 section of MA 15, for the class meeting on Friday March 20. Visit the class website for the handouts! http://cstaecker.fairfield.edu/~cstaecker/courses/2020s015/ Fast forward music is from "Now Get Busy" by the Beastie Boys, licensed Creative Commons Non

From playlist Math 15 Spring 2020

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Your Daily Equation #14: Quantum Entanglement or Einstein's Spooky Action

Episode 14 #YourDailyEquation: Quantum entanglement is the strangest quality of quantum reality. Einstein called it "spooky," because, well, it is. Join Brian Greene to explore the basic ideas visually and then take a look at the essential equations. Even if your math is a bit rusty, join

From playlist Your Daily Equation with Brian Greene

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12. Transaction Malleability and Segregated Witness

MIT MAS.S62 Cryptocurrency Engineering and Design, Spring 2018 Instructor: Tadge Dryja View the complete course: https://ocw.mit.edu/MAS-S62S18 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP61KHzhg3JIJdK08JLSlcLId Transaction malleability and segregated witness are co

From playlist MIT MAS.S62 Cryptocurrency Engineering and Design, Spring 2018

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Computation Ep33, The Halting Problem (Apr 27, 2022)

This is a recording of a live class for Math 3342, Theory of Computation, an undergraduate course for math and computer science majors at Fairfield University, Spring 2022. The course is about finite automata, Turing machines, and related topics. Homework and handouts at the class websi

From playlist Math 3342 (Theory of Computation) Spring 2022

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ME565 Lecture 2: Roots of unity, branch cuts, analytic functions, and the Cauchy-Riemann conditions

ME565 Lecture 2 Engineering Mathematics at the University of Washington Roots of unity, branch cuts, analytic functions, and the Cauchy-Riemann conditions Notes: http://faculty.washington.edu/sbrunton/me565/pdf/L02.pdf Course Website: http://faculty.washington.edu/sbrunton/me565/ http

From playlist Engineering Mathematics (UW ME564 and ME565)

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#2 Idenitfying Irrational numbers

An example that helps in identifying irrational numbers and understanding the basic concepts of irrational numbers.

From playlist Middle School This Year

Related pages

Untouchable number | Prime number | Multiple (mathematics) | Parity (mathematics) | Natural number | Semiperfect number | Set (mathematics) | Cramér's conjecture | Integer | Two's complement | Divisor | Conjecture | Abundant number | Number theory | Subset