Triperfect Number/Examples/120

Example of Triperfect Number

$120$ is triperfect:

$\map {\sigma_1} {120} = 360 = 3 \times 120$

Proof

From $\sigma_1$ of $120$:

$\map {\sigma_1} {120} = 360$

Hence the result.

$\blacksquare$

Sources

• 1919: Leonard Eugene Dickson: History of the Theory of Numbers: Volume $\text { I }$ ... (previous) ... (next): Preface