Since 4 is a factor of 8, it is automatically the GCF.
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The Greatest Common Factor (GCF) of 8 and 68 is: 4
The greatest common factor of 8 and 44 is 4.
The GCF of 4 and 8 is 4.
There cannot be a common or greatest common factor of just one number. You need two or more numbers.
The greatest common factor of 8, 32, 40, and 52 is 4.