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The GCF of 21 and 384 is 3.
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Find HCF of: 42 & 768 63 & 1152 7 & 128 105 & 1920 147 & 2688 42 & 384 21 & 768 63 & 384 21 & 1152 105 & 384 21 & 1920 147 & 384 21 & 2688
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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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