Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In mathematics, an aliquot sequence is a recursive sequence in which each term is the sum of the proper divisors of the previous term. The aliquot sequence starting with a positive integer k can be defined formally in terms of the sum-of-divisors function 1 in the following way: s0 = k sn = 1(sn–1) – sn–1.

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