perfect number

短语

[计] 完全数

发音

其它

词形变化

perfect numbers 复数 perfect numbers

释义与例句

n.
  1. 1.

    A number that is the sum of all of its divisors except itself.

    完全数

    数学

    The factors of 6 are 1, 2, 3 and 6, and 1 + 2 + 3 = 6, so 6 is a perfect number.

词源

Calque of Latin numerus perfectus, with this use of perfectus itself a semantic loan from Ancient Greek τέλειος (téleios).

来源：wiktionary