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The GCF of 21 and 670 is 1.
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Find HCF of: 42 & 1340 63 & 2010 105 & 3350 147 & 4690 42 & 670 21 & 1340 63 & 670 21 & 2010 105 & 670 21 & 3350 147 & 670 21 & 4690
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The greatest common factor (GCF) is also known as greatest common divisor (GCD) or highest common factor (HCF).
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