30,240

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Number

$30 \, 240$ (thirty thousand, two hundred and forty) is:

$2^5 \times 3^3 \times 5 \times 7$

The $1$st quadruply perfect number:

$\map {\sigma_1} {30 \, 240} = 120 \, 960 = 4 \times 30 \, 240$

Arithmetic Functions on $30 \, 240$

\(\ds \map {\sigma_1} { 30 \, 240 }\)

\(=\)

\(\ds 120 \, 960\)

$\sigma_1$ of $30 \, 240$

Also see

• Next: Quadruply Perfect Number

Sources

• 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $30,240$