Greatest Common Factor of 42, 72, 89, 20

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

• Greatest Common Factor of 42, 72, 89, 20 by common division method
• Greatest Common Factor of 42, 72, 89, 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 42

List of positive integer factors of 42 that divides 42 without a remainder.

1,2,3,6,7,14,21,42

Factors of 72

List of positive integer factors of 72 that divides 72 without a remainder.

1,2,3,4,6,8,9,12,18,24,36,72

Factors of 89

List of positive integer factors of 89 that divides 89 without a remainder.

1,89

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 42,72,89,20 . The biggest common factor number is the GCF number.
So the greatest common factor 42,72,89,20 is 1.

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

• GCF of 76, 53, 32, 51
• GCF of 65, 21, 55, 41
• GCF of 17, 33, 56, 46
• GCF of 17, 66, 80, 28
• GCF of 54, 21, 42, 78

1. What is the GCF of 42, 72, 89, 20?

Answer: GCF of 42, 72, 89, 20 is 1.

2. How to Find the GCF of 42, 72, 89, 20

Answer: Greatest Common Factor(GCF) of 42, 72, 89, 20 = 1

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

Step 2: Then multiply all the prime factors GCF(42, 72, 89, 20) = 1.