Source: wikibot/almost-perfect-number
= Almost perfect number
{wiki=Almost_perfect_number}
An "almost perfect number" is a type of natural number that is closely related to perfect numbers. A perfect number is a positive integer that is equal to the sum of its proper divisors (excluding itself). For example, 6 is a perfect number because its divisors (1, 2, and 3) add up to 6.