We can check if 13 is a factor of 3927 by dividing 3927 by 13 (this is because if 13 is a factor of 3927, that means that 13 can be multiplied by another whole number to equal 3927, or divided equally into 3927)
3927 divided by 13=302.0769231
Factors of a number are whole numbers, so 13 is not a factor of 3927, because we came up with a decimal number.
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