Proper divisor

Revision as of 10:12, 10 September 2012 by JBL (talk | contribs) (Undo revision 48250 by X23rocks (talk) That information is already included in the article)

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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