hyperperfect number

短语

词形变化

hyperperfect numbers 复数 hyperperfect numbers

释义与例句

n.
  1. 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.

    数学

    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.

词源

From hyper- + perfect number.

来源：wiktionary