The prime factorization of 525 is 3*7*5*5
The prime factorization of 630 is 2*3*3*5*7
The factors they have in common are 3*5*7 = 105, so the greatest common factor is 105.
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The GCF of 420 and 630 is 210.
210
The answer is 35.
It is: 63
There is neither a greatest common factor nor common factors of a single number, such as 630, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor.