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Is 13 a perfect number

Updated: 4/28/2022
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8y ago

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No, it is not.

Incidentally, is a number p is prime then its 2 factors are 1 and p. Their sum is p+1.

If p is a perfect number then this sum must be 2p.

That is, p+1 = 2p or p = 1.


But 1 is not a prime. So no prime can be a perfect number and since 13 is prime, it cannot be a perfect number.


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9y ago
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