Solutions by everydaycalculation.com

The GCF of 1608 and 21 is 3.

- Find the prime factorization of 1608

1608 = 2 × 2 × 2 × 3 × 67 - Find the prime factorization of 21

21 = 3 × 7 - To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 3

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Find hcf of: 3216 & 42 4824 & 63 536 & 7 8040 & 105 3216 & 21 1608 & 42 4824 & 21 1608 & 63 8040 & 21 1608 & 105 1608 & 147

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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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