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Proper divisor

Revision as of 17:17, 16 April 2018 by Expilncalc (talk | contribs) (→‎See Also)

A proper divisor of a positive integer $n$ is any divisor of $n$ other than $n$ itself. Thus, prime numbers have exactly one proper divisor, 1, and every other number has at least two proper divisors.

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