Greatest Common Factor of 31, 21, 20, 324

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

• Greatest Common Factor of 31, 21, 20, 324 by common division method
• Greatest Common Factor of 31, 21, 20, 324 with matching the biggest common factor

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∴ GCF of numbers is 1 because of no common factors present between them.

Factors of 31

List of positive integer factors of 31 that divides 31 without a remainder.

1,31

Factors of 21

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

1,3,7,21

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 324

List of positive integer factors of 324 that divides 324 without a remainder.

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

Greatest Common Factor

We found the factors 31,21,20,324 . The biggest common factor number is the GCF number.
So the greatest common factor 31,21,20,324 is 1.

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

• GCF of 71, 28, 54, 818
• GCF of 92, 94, 83, 894
• GCF of 17, 37, 31, 130
• GCF of 52, 79, 68, 883
• GCF of 35, 31, 45, 271

1. What is the GCF of 31, 21, 20, 324?

Answer: GCF of 31, 21, 20, 324 is 1.

2. How to Find the GCF of 31, 21, 20, 324

Answer: Greatest Common Factor(GCF) of 31, 21, 20, 324 = 1

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

Step 2: Then multiply all the prime factors GCF(31, 21, 20, 324) = 1.