Category:Giuga Numbers

This category contains results about Giuga Numbers.
Definitions specific to this category can be found in Definitions/Giuga Numbers.

Let $n$ be a positive integer.

$n$ is a Giuga number if and only if:

$\ds \sum_{p \mathop \divides n} \frac 1 p - \prod_{p \mathop \divides n} \frac 1 p \in \Z_{\ge 0}$