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The GCF of 21 and 270 is 3.
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Find HCF of: 42 & 540 63 & 810 7 & 90 105 & 1350 147 & 1890 42 & 270 21 & 540 63 & 270 21 & 810 105 & 270 21 & 1350 147 & 270 21 & 1890
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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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