Greatest Common Factor of 21, 157, 109

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

• Greatest Common Factor of 21, 157, 109 by common division method
• Greatest Common Factor of 21, 157, 109 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 21

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

1,3,7,21

Factors of 157

List of positive integer factors of 157 that divides 157 without a remainder.

1,157

Factors of 109

List of positive integer factors of 109 that divides 109 without a remainder.

1,109

Greatest Common Factor

We found the factors 21,157,109 . The biggest common factor number is the GCF number.
So the greatest common factor 21,157,109 is 1.

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

• GCF of 81, 626, 215
• GCF of 23, 326, 486
• GCF of 34, 992, 939
• GCF of 87, 885, 745
• GCF of 15, 682, 347

1. What is the GCF of 21, 157, 109?

Answer: GCF of 21, 157, 109 is 1.

2. How to Find the GCF of 21, 157, 109

Answer: Greatest Common Factor(GCF) of 21, 157, 109 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 157, 109) = 1.