381
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Number
$381$ (three hundred and eighty-one) is:
- $3 \times 127$
- The $8$th positive integer after $1$, $7$, $102$, $110$, $142$, $159$, $187$ the sum of whose divisors is a cube:
- $\map {\sigma_1} {381} = 512 = 8^3$
- The $19$th inconsummate number after $62$, $63$, $65$, $75$, $84$, $95$, $161$, $173$, $195$, $216$, $261$, $266$, $272$, $276$, $326$, $371$, $372$, $377$:
- $\nexists n \in \Z_{>0}: n = 381 \times \map {s_{10} } n$