hyperperfect number

名词 n.
中文释义

英文释义

名词 n.
  1. Any natural number n for which, for some positive integer k, n = 1 + k(σ(n) - n - 1), where σ(n) is the sum of the positive divisors of n.
    — 1966, American Mathematical Society Translations, page 258, […] the asymptotic density of all hyperperfect numbers, that is, numbers m for which m | σ(m), is equal to zero.

词形变化

hyperperfect numbers plural

词源

From hyper- + perfect number.
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