Greatest Common Factor of 20, 91, 66, 86

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

• Greatest Common Factor of 20, 91, 66, 86 by common division method
• Greatest Common Factor of 20, 91, 66, 86 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 20

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

1,2,4,5,10,20

Factors of 91

List of positive integer factors of 91 that divides 91 without a remainder.

1,7,13,91

Factors of 66

List of positive integer factors of 66 that divides 66 without a remainder.

1,2,3,6,11,22,33,66

Factors of 86

List of positive integer factors of 86 that divides 86 without a remainder.

1,2,43,86

Greatest Common Factor

We found the factors 20,91,66,86 . The biggest common factor number is the GCF number.
So the greatest common factor 20,91,66,86 is 1.

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

• GCF of 45, 50, 87, 69
• GCF of 89, 90, 96, 18
• GCF of 69, 83, 92, 36
• GCF of 89, 14, 32, 53
• GCF of 78, 33, 13, 18

1. What is the GCF of 20, 91, 66, 86?

Answer: GCF of 20, 91, 66, 86 is 1.

2. How to Find the GCF of 20, 91, 66, 86

Answer: Greatest Common Factor(GCF) of 20, 91, 66, 86 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 91, 66, 86) = 1.