The greatest common factor (GCF) is: 20
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greatest common factor of 56 280 and 400 is 8.
The Greatest Common Factor (GCF) is: 20.
The greatest common factor of 220 and 400 is 20.
The greatest common factor of 400 and 2040 is 40.
Since 80 is a factor of 400, it is automatically the GCF.