Greatest Common Factor of 20, 77, 86, 64, 28

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

• Greatest Common Factor of 20, 77, 86, 64, 28 by common division method
• Greatest Common Factor of 20, 77, 86, 64, 28 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 77

List of positive integer factors of 77 that divides 77 without a remainder.

1,7,11,77

Factors of 86

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

1,2,43,86

Factors of 64

List of positive integer factors of 64 that divides 64 without a remainder.

1,2,4,8,16,32,64

Factors of 28

List of positive integer factors of 28 that divides 28 without a remainder.

1,2,4,7,14,28

Greatest Common Factor

We found the factors 20,77,86,64,28 . The biggest common factor number is the GCF number.
So the greatest common factor 20,77,86,64,28 is 1.

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

• GCF of 89, 52, 69, 27, 76
• GCF of 52, 73, 10, 62, 83
• GCF of 62, 85, 89, 51, 32
• GCF of 57, 54, 63, 14, 77
• GCF of 88, 11, 29, 62, 74

1. What is the GCF of 20, 77, 86, 64, 28?

Answer: GCF of 20, 77, 86, 64, 28 is 1.

2. How to Find the GCF of 20, 77, 86, 64, 28

Answer: Greatest Common Factor(GCF) of 20, 77, 86, 64, 28 = 1

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

Step 2: Then multiply all the prime factors GCF(20, 77, 86, 64, 28) = 1.