Greatest Common Factor of 21, 12, 180

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

• Greatest Common Factor of 21, 12, 180 by common division method
• Greatest Common Factor of 21, 12, 180 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 180

List of positive integer factors of 180 that divides 180 without a remainder.

1,2,3,4,5,6,9,10,12,15,18,20,30,36,45,60,90,180

Greatest Common Factor

We found the factors 21,12,180 . The biggest common factor number is the GCF number.
So the greatest common factor 21,12,180 is 3.

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

• GCF of 43, 40, 410
• GCF of 39, 50, 140
• GCF of 78, 83, 742
• GCF of 81, 65, 464
• GCF of 14, 44, 737

1. What is the GCF of 21, 12, 180?

Answer: GCF of 21, 12, 180 is 3.

2. How to Find the GCF of 21, 12, 180

Answer: Greatest Common Factor(GCF) of 21, 12, 180 = 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, 180) = 3.