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sigma(n)=x*(x+1)^3
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2020-09-29, 09:26
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enzocreti
Mar 2018
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sigma(n)=x*(x+1)^3
let be sigma(n) the sum of the divisors of n
something is known about numbers n such that
sigma(n)=x*(x+1)^3 with x positive integer?
for example n=69660, sigma(69660)=21*(22^3)
are there infinitely many examples?
enzocreti
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