Searching map area
Semiperfect number
? TBD
Number equal to the sum of all or some of its divisors
Join to rate
Join to rate

In number theory, a semiperfect number or pseudoperfect number is a natural number n equal to the sum of all or some of its proper divisors. A semiperfect number equal to the sum of all its proper divisors is a perfect number.

Subclass of
Composite number
Wikidata