81,081
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Number
$81 \, 081$ (eighty-one thousand and eighty-one) is:
- $3^4 \times 7 \times 11 \times 13$
- The $1$st odd abundant number which does not have $5$ as a prime factor:
- $\map {\sigma_1} {81 \, 081} - 81 \, 081 = 81 \, 543 > 81 \, 081$
Arithmetic Functions on $81 \, 081$
\(\ds \map {\sigma_1} { 81 \, 081 }\) | \(=\) | \(\ds 162 \, 624\) | $\sigma_1$ of $81 \, 081$ |
Also see
Sources
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $81,081$