Greatest Common Factor of 79, 21, 645

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

• Greatest Common Factor of 79, 21, 645 by common division method
• Greatest Common Factor of 79, 21, 645 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 79

List of positive integer factors of 79 that divides 79 without a remainder.

1,79

Factors of 21

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

1,3,7,21

Factors of 645

List of positive integer factors of 645 that divides 645 without a remainder.

1,3,5,15,43,129,215,645

Greatest Common Factor

We found the factors 79,21,645 . The biggest common factor number is the GCF number.
So the greatest common factor 79,21,645 is 1.

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

• GCF of 86, 25, 316
• GCF of 62, 80, 344
• GCF of 80, 43, 698
• GCF of 74, 51, 493
• GCF of 38, 99, 360

1. What is the GCF of 79, 21, 645?

Answer: GCF of 79, 21, 645 is 1.

2. How to Find the GCF of 79, 21, 645

Answer: Greatest Common Factor(GCF) of 79, 21, 645 = 1

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

Step 2: Then multiply all the prime factors GCF(79, 21, 645) = 1.