Smallest Multiply Perfect Number of Order 6
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Theorem
The number $154 \, 345 \, 556 \, 085 \, 770 \, 649 \, 600$ is multiply perfect of order $6$:
\(\ds \map {\sigma_1} {154 \, 345 \, 556 \, 085 \, 770 \, 649 \, 600}\) | \(=\) | \(\ds 926 \, 073 \, 336 \, 514 \, 623 \, 897 \, 600\) | ||||||||||||
\(\ds \) | \(=\) | \(\ds 6 \times 154 \, 345 \, 556 \, 085 \, 770 \, 649 \, 600\) |
It is the smallest positive integer to be so.
Proof
From $\sigma_1$ of $154 \, 345 \, 556 \, 085 \, 770 \, 649 \, 600$:
- $\map {\sigma_1} {154 \, 345 \, 556 \, 085 \, 770 \, 649 \, 600} = 926 \, 073 \, 336 \, 514 \, 623 \, 897 \, 600$
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Sources
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $154,345,556,085,770,649,600$