Greatest Common Factor of 85, 31, 72, 20

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

• Greatest Common Factor of 85, 31, 72, 20 by common division method
• Greatest Common Factor of 85, 31, 72, 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 85

List of positive integer factors of 85 that divides 85 without a remainder.

1,5,17,85

Factors of 31

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

1,31

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 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 85,31,72,20 . The biggest common factor number is the GCF number.
So the greatest common factor 85,31,72,20 is 1.

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

• GCF of 75, 42, 86, 69
• GCF of 43, 42, 45, 98
• GCF of 37, 77, 54, 91
• GCF of 88, 78, 51, 27
• GCF of 98, 52, 17, 76

1. What is the GCF of 85, 31, 72, 20?

Answer: GCF of 85, 31, 72, 20 is 1.

2. How to Find the GCF of 85, 31, 72, 20

Answer: Greatest Common Factor(GCF) of 85, 31, 72, 20 = 1

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

Step 2: Then multiply all the prime factors GCF(85, 31, 72, 20) = 1.