Greatest Common Factor of 21, 12, 156

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

• Greatest Common Factor of 21, 12, 156 by common division method
• Greatest Common Factor of 21, 12, 156 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 12

List of positive integer factors of 12 that divides 12 without a remainder.

1,2,3,4,6,12

Factors of 156

List of positive integer factors of 156 that divides 156 without a remainder.

1,2,3,4,6,12,13,26,39,52,78,156

Greatest Common Factor

We found the factors 21,12,156 . The biggest common factor number is the GCF number.
So the greatest common factor 21,12,156 is 3.

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

• GCF of 98, 51, 321
• GCF of 69, 28, 983
• GCF of 58, 68, 955
• GCF of 98, 98, 148
• GCF of 37, 47, 776

1. What is the GCF of 21, 12, 156?

Answer: GCF of 21, 12, 156 is 3.

2. How to Find the GCF of 21, 12, 156

Answer: Greatest Common Factor(GCF) of 21, 12, 156 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 12, 156) = 3.