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## #1 2008-09-09 11:29:40

janette diaz
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### proper factor

My daughter have a homework of inter-math . she was on 6 grade and I dont understand this:  Why is the set of factors of a number not the same as the set of proper factors of that number? Explain and give example.

## #2 2008-09-09 15:56:20

MathsIsFun

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### Re: proper factor

The "proper factors" are the factors other than the number itself. Sometimes 1 is also excluded.

Factors of 12: 1,2,3,4,6,12
Proper Factors of 12: 1,2,3,4,6

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..."  - Leon M. Lederman

## #3 2008-09-10 01:02:28

JaneFairfax
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### Re: proper factor

#### MathsIsFun wrote:

Sometimes 1 is also excluded.

Sometimes 1 is called the trivial factor.

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