Concept information
Terme préférentiel
quasiperfect number
Définition
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In mathematics, a quasiperfect number is a natural number n for which the sum of all its divisors (the divisor function σ(n)) is equal to 2n + 1. Equivalently, n is the sum of its non-trivial divisors (that is, its divisors excluding 1 and n). No quasiperfect numbers have been found so far. The quasiperfect numbers are the abundant numbers of minimal abundance (which is 1).
(Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Quasiperfect_number)
Concept générique
Traductions
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français
URI
http://data.loterre.fr/ark:/67375/PSR-PTHTKNB0-C
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