Definition:Triperfect Number/Historical Note
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Historical Note on Triperfect Number
Marin Mersenne was the first to discover the smallest triperfect number $120$.
He suggested to René Descartes that it would be an interesting exercise to hunt down further examples of integers $n$ whose divisors added up to an integer multiple of $n$.
Sources
- 1986: David Wells: Curious and Interesting Numbers ... (previous) ... (next): $120$
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $120$