Greatest Common Factor of 56, 21, 39, 8, 20

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

• Greatest Common Factor of 56, 21, 39, 8, 20 by common division method
• Greatest Common Factor of 56, 21, 39, 8, 20 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 56

List of positive integer factors of 56 that divides 56 without a remainder.

1,2,4,7,8,14,28,56

Factors of 21

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

1,3,7,21

Factors of 39

List of positive integer factors of 39 that divides 39 without a remainder.

1,3,13,39

Factors of 8

List of positive integer factors of 8 that divides 8 without a remainder.

1,2,4,8

Factors of 20

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

1,2,4,5,10,20

Greatest Common Factor

We found the factors 56,21,39,8,20 . The biggest common factor number is the GCF number.
So the greatest common factor 56,21,39,8,20 is 1.

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

• GCF of 89, 68, 26, 3, 31
• GCF of 14, 45, 43, 5, 10
• GCF of 70, 92, 62, 6, 63
• GCF of 91, 61, 30, 1, 96
• GCF of 43, 63, 85, 6, 23

1. What is the GCF of 56, 21, 39, 8, 20?

Answer: GCF of 56, 21, 39, 8, 20 is 1.

2. How to Find the GCF of 56, 21, 39, 8, 20

Answer: Greatest Common Factor(GCF) of 56, 21, 39, 8, 20 = 1

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

Step 2: Then multiply all the prime factors GCF(56, 21, 39, 8, 20) = 1.