Arithmetic functions | Arithmetic dynamics | Divisor function

Aliquot sequence

In mathematics, an aliquot sequence is a sequence of positive integers in which each term is the sum of the proper divisors of the previous term. If the sequence reaches the number 1, it ends, since the sum of the proper divisors of 1 is 0. (Wikipedia).

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John Selfridge | Untouchable number | Perfect number | Bounded function | Prime number | Richard K. Guy | Limit (mathematics) | Mathematics | Sociable number | Aliquot sum | Eugène Charles Catalan | Cycle (graph theory) | Directed graph | Leonard Eugene Dickson | Conjecture | Arithmetic dynamics | Divisor function