Yes, because 126 divided by 7 is 18 (if the answer is a whole number, it is a factor)
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The GCF is 7.
126 and 49 are not relatively prime because they have 7 as a common prime factor.
The factor pairs of 126 are 1 x 126, 2 x 63, 3 x 42, 6 x 21, 7 x 18, and 9 x 14
all of the factors of 126 are 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126
Well, isn't that just a happy little question! To find the greatest common factor of 126 and 252, we can list the factors of each number and see which is the largest one they have in common. The factors of 126 are 1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, and 126, and the factors of 252 are 1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, and 252. The greatest common factor of 126 and 252 is 126, which means they both can be divided evenly by 126.