Greatest Common Factor of 28, 22, 12, 81

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

• Greatest Common Factor of 28, 22, 12, 81 by common division method
• Greatest Common Factor of 28, 22, 12, 81 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 22

List of positive integer factors of 22 that divides 22 without a remainder.

1,2,11,22

Factors of 12

List of positive integer factors of 12 that divides 12 without a remainder.

1,2,3,4,6,12

Factors of 81

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

1,3,9,27,81

Greatest Common Factor

We found the factors 28,22,12,81 . The biggest common factor number is the GCF number.
So the greatest common factor 28,22,12,81 is 1.

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

• GCF of 62, 17, 28, 60
• GCF of 79, 38, 26, 53
• GCF of 64, 35, 99, 51
• GCF of 65, 66, 36, 91
• GCF of 33, 28, 88, 90

1. What is the GCF of 28, 22, 12, 81?

Answer: GCF of 28, 22, 12, 81 is 1.

2. How to Find the GCF of 28, 22, 12, 81

Answer: Greatest Common Factor(GCF) of 28, 22, 12, 81 = 1

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

Step 2: Then multiply all the prime factors GCF(28, 22, 12, 81) = 1.