Quadruply Perfect Number/Examples/30,240

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Example of Quadruply Perfect Number

$30 \, 240$ is quadruply perfect:

$\sigma \left({30 \, 240}\right) = 120 \, 960 = 4 \times 30 \, 240$


Proof

From $\sigma$ of $30 \, 240$:

$\sigma \left({30 \, 240}\right) = 120 \, 960$

Hence the result.

$\blacksquare$

Sources