KnowraPerfect numberLinked fromLinked fromThe 7 pages that link to Perfect number, each with the reason it gives.All 7Broader topic 3Related 3Narrower topic 1Mersenne primeBroader topic: The formula 2^(p−1)(2^p−1) constructs one whenever 2^p−1 is prime.Aliquot sequenceBroader topic: Its next term equals itself, producing a fixed-point sequence.Aliquot sumBroader topic: A perfect number is a fixed point of the aliquot-sum operation.