Greatest Common Factor of 21, 648, 180

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

• Greatest Common Factor of 21, 648, 180 by common division method
• Greatest Common Factor of 21, 648, 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 648

List of positive integer factors of 648 that divides 648 without a remainder.

1,2,3,4,6,8,9,12,18,24,27,36,54,72,81,108,162,216,324,648

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 21,648,180 . The biggest common factor number is the GCF number.
So the greatest common factor 21,648,180 is 3.

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

• GCF of 27, 278, 997
• GCF of 33, 411, 797
• GCF of 75, 176, 647
• GCF of 33, 891, 389
• GCF of 26, 804, 868

1. What is the GCF of 21, 648, 180?

Answer: GCF of 21, 648, 180 is 3.

2. How to Find the GCF of 21, 648, 180

Answer: Greatest Common Factor(GCF) of 21, 648, 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, 648, 180) = 3.