Greatest Common Factor of 28, 31, 26, 81, 80

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

• Greatest Common Factor of 28, 31, 26, 81, 80 by common division method
• Greatest Common Factor of 28, 31, 26, 81, 80 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 28

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

1,2,4,7,14,28

Factors of 31

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

1,31

Factors of 26

List of positive integer factors of 26 that divides 26 without a remainder.

1,2,13,26

Factors of 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Factors of 80

List of positive integer factors of 80 that divides 80 without a remainder.

1,2,4,5,8,10,16,20,40,80

Greatest Common Factor

We found the factors 28,31,26,81,80 . The biggest common factor number is the GCF number.
So the greatest common factor 28,31,26,81,80 is 1.

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

• GCF of 15, 77, 55, 14, 41
• GCF of 58, 20, 62, 59, 63
• GCF of 97, 97, 44, 38, 81
• GCF of 62, 34, 35, 60, 97
• GCF of 60, 60, 84, 34, 20

1. What is the GCF of 28, 31, 26, 81, 80?

Answer: GCF of 28, 31, 26, 81, 80 is 1.

2. How to Find the GCF of 28, 31, 26, 81, 80

Answer: Greatest Common Factor(GCF) of 28, 31, 26, 81, 80 = 1

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

Step 2: Then multiply all the prime factors GCF(28, 31, 26, 81, 80) = 1.