Greatest Common Factor of 80, 21, 35, 138

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

• Greatest Common Factor of 80, 21, 35, 138 by common division method
• Greatest Common Factor of 80, 21, 35, 138 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 80

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

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

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 35

List of positive integer factors of 35 that divides 35 without a remainder.

1,5,7,35

Factors of 138

List of positive integer factors of 138 that divides 138 without a remainder.

1,2,3,6,23,46,69,138

Greatest Common Factor

We found the factors 80,21,35,138 . The biggest common factor number is the GCF number.
So the greatest common factor 80,21,35,138 is 1.

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

• GCF of 45, 81, 91, 601
• GCF of 13, 41, 66, 701
• GCF of 78, 40, 97, 627
• GCF of 28, 68, 81, 224
• GCF of 71, 32, 73, 321

1. What is the GCF of 80, 21, 35, 138?

Answer: GCF of 80, 21, 35, 138 is 1.

2. How to Find the GCF of 80, 21, 35, 138

Answer: Greatest Common Factor(GCF) of 80, 21, 35, 138 = 1

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

Step 2: Then multiply all the prime factors GCF(80, 21, 35, 138) = 1.