Smallest Multiply Perfect Number of Order 5
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Theorem
The number $14 \, 182 \, 439 \, 040$ is multiply perfect of order $5$:
- $\map {\sigma_1} {14 \, 182 \, 439 \, 040} = 70 \, 912 \, 195 \, 200 = 5 \times 14 \, 182 \, 439 \, 040$
It is the smallest positive integer to be so.
Proof
From $\sigma_1$ of $14 \, 182 \, 439 \, 040$:
- $\map {\sigma_1} {14 \, 182 \, 439 \, 040} = 70 \, 912 \, 195 \, 200$
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Sources
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $14,182,439,040$