Greatest Common Factor of 80, 21, 80, 691

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

• Greatest Common Factor of 80, 21, 80, 691 by common division method
• Greatest Common Factor of 80, 21, 80, 691 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 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 691

List of positive integer factors of 691 that divides 691 without a remainder.

1,691

Greatest Common Factor

We found the factors 80,21,80,691 . The biggest common factor number is the GCF number.
So the greatest common factor 80,21,80,691 is 1.

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

• GCF of 30, 79, 47, 214
• GCF of 36, 84, 60, 618
• GCF of 13, 32, 23, 813
• GCF of 27, 81, 52, 970
• GCF of 77, 35, 23, 601

1. What is the GCF of 80, 21, 80, 691?

Answer: GCF of 80, 21, 80, 691 is 1.

2. How to Find the GCF of 80, 21, 80, 691

Answer: Greatest Common Factor(GCF) of 80, 21, 80, 691 = 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, 80, 691) = 1.