A positive integer m is perfect if the sum of all its positive divisors, 1 and m inclusive, is equal to 2m.
Determine the positive integers n such that nn+1 is a perfect number.
n={3}
Divisors of 28 are {1,2,4,7,14,28}
56 = 2*(28) = 1+2+4+7+14+28 therefore 28 is a perfect number,
and as 33+1 = 28, 3 is in the set of positive integers n where nn+1 is a perfect number.
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Posted by Dej Mar
on 2021-02-07 11:13:06 |