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Divisors' sum = square (Posted on 2019-05-27)

The number 22 divisors are 1, 2, 11, 22, which add up to 36, a square.
There are 4 more numbers like that below 100.

List them.

See The Solution Submitted by Ady TZIDON

Rating: 3.0000 (2 votes)

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Sequence

| Comment 2 of 9 |

Has the interesting statement: If a and b are in the sequence and relatively prime, then a*b is also in the sequence.

Posted by Jer on 2019-05-28 10:08:56

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