Greatest Common Factor of 81, 65, 28, 71

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

• Greatest Common Factor of 81, 65, 28, 71 by common division method
• Greatest Common Factor of 81, 65, 28, 71 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 81

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

1,3,9,27,81

Factors of 65

List of positive integer factors of 65 that divides 65 without a remainder.

1,5,13,65

Factors of 28

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

1,2,4,7,14,28

Factors of 71

List of positive integer factors of 71 that divides 71 without a remainder.

1,71

Greatest Common Factor

We found the factors 81,65,28,71 . The biggest common factor number is the GCF number.
So the greatest common factor 81,65,28,71 is 1.

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

• GCF of 91, 17, 20, 27
• GCF of 38, 22, 11, 11
• GCF of 58, 35, 29, 85
• GCF of 37, 21, 12, 55
• GCF of 55, 88, 94, 93

1. What is the GCF of 81, 65, 28, 71?

Answer: GCF of 81, 65, 28, 71 is 1.

2. How to Find the GCF of 81, 65, 28, 71

Answer: Greatest Common Factor(GCF) of 81, 65, 28, 71 = 1

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

Step 2: Then multiply all the prime factors GCF(81, 65, 28, 71) = 1.