English Explanatory Dictionary

perfect number

English dictionary entry

Meanings

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

Pronunciation

LL-Q1860 (eng)-Vealhurl-perfect number.wav

Word forms

perfect number perfect numbers

Etymology

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

Related words

abundant number amicable numbers deficient number Mersenne prime sociable numbers

Derived words

hyperperfect number
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