2 x 2 x 2 x 3 x 7 = 168
2 x 2 x 3 x 3 x 5 = 180
2 x 3 x 3 x 5 x 5 = 450
Select the common factors.
2 x 3 = 6, the GCF
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45 and any factor of 45 15 and 9 9 and 5
The greatest common factor of 15 and 105 is 15.
Since 15 is a factor of 60, it is automatically the GCF.
The greatest common factor of the numbers 1,830 and 60 is 30.
The greatest common factor of the numbers 180 and 150 is 30.