Finding Factors

One helpful hint in finding factors is to think about the number your pick, and start going through each whole between

1 and N/2.  Here is an example using the number 40.


40

1 x 40              40/2=20 therefore....
2 x 20              3 is not a factor of 40, but 4 is.  40/4 = 10
4 x 10              5 is a factor of 40 because 40/8 = 5
5 x 8              

6 and 7 are not factors of 40, so when factors repeat, we have found all the factors of a number.

The factors of 40 are 1, 2, 4, 5, 8, 10, 20, and 40.