What is the GCF of 221 and 1620?
The GCF of 221 and 1620 is 1.
Steps to find GCF
- Find the prime factorization of 221
221 = 13 × 17 - Find the prime factorization of 1620
1620 = 2 × 2 × 3 × 3 × 3 × 3 × 5 - To find the GCF, multiply all the prime factors common to both numbers:
Note that there are no common prime factors. - Therefore, GCF = 1 (since 1 is a factor of every number)
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Related
Find HCF of: 442 & 3240 663 & 4860 1105 & 8100 442 & 1620 221 & 3240 663 & 1620 221 & 4860 1105 & 1620 221 & 8100 1547 & 1620
GCF Calculator
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The greatest common factor (GCF) is also known as greatest common divisor (GCD) or highest common factor (HCF).