Source: wikibot/unitary-perfect-number
= Unitary perfect number
{wiki=Unitary_perfect_number}
A **unitary perfect number** is a special type of number that is defined in relation to its divisors. To understand unitary perfect numbers, we first need to define a few terms: 1. **Unitary Divisor:** A divisor \\( d \\) of a number \\( n \\) is called a unitary divisor if \\( \\gcd(d, n/d) = 1 \\).