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The GCF of 21 and 669 is 3.
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Find HCF of: 42 & 1338 63 & 2007 7 & 223 105 & 3345 147 & 4683 42 & 669 21 & 1338 63 & 669 21 & 2007 105 & 669 21 & 3345 147 & 669 21 & 4683
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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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