Definition:Quasiperfect Number/Definition 1

= Definition ==

Let $n \in \Z_{\ge 0}$ be a positive integer.

Let $A \left({n}\right)$ denote the abundance of $n$.

$n$ is quasiperfect $A \left({n}\right) = 1$.

Also see

 * Equivalence of Definitions of Quasiperfect Number