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The GCF of 21 and 561 is 3.
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Find HCF of: 42 & 1122 63 & 1683 7 & 187 105 & 2805 147 & 3927 42 & 561 21 & 1122 63 & 561 21 & 1683 105 & 561 21 & 2805 147 & 561 21 & 3927
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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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