Greatest Common Factor of 21, 63, 972

Greatest common factor or Greatest common divisor (GCD) can be calculated in two ways

• Greatest Common Factor of 21, 63, 972 by common division method
• Greatest Common Factor of 21, 63, 972 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 = 3

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 63

List of positive integer factors of 63 that divides 63 without a remainder.

1,3,7,9,21,63

Factors of 972

List of positive integer factors of 972 that divides 972 without a remainder.

1,2,3,4,6,9,12,18,27,36,54,81,108,162,243,324,486,972

Greatest Common Factor

We found the factors 21,63,972 . The biggest common factor number is the GCF number.
So the greatest common factor 21,63,972 is 3.

Here are some samples of GCF of two or more Numbers calculations.

• GCF of 25, 88, 851
• GCF of 21, 48, 701
• GCF of 45, 93, 559
• GCF of 77, 58, 468
• GCF of 44, 59, 752

1. What is the GCF of 21, 63, 972?

Answer: GCF of 21, 63, 972 is 3.

2. How to Find the GCF of 21, 63, 972

Answer: Greatest Common Factor(GCF) of 21, 63, 972 = 3

Step 1: Divide all the numbers with common prime numbers having remainder zero.

Step 2: Then multiply all the prime factors GCF(21, 63, 972) = 3.