Greatest Common Factor of 646, 157, 21

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

• Greatest Common Factor of 646, 157, 21 by common division method
• Greatest Common Factor of 646, 157, 21 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 646

List of positive integer factors of 646 that divides 646 without a remainder.

1,2,17,19,34,38,323,646

Factors of 157

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

1,157

Factors of 21

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

1,3,7,21

Greatest Common Factor

We found the factors 646,157,21 . The biggest common factor number is the GCF number.
So the greatest common factor 646,157,21 is 1.

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

• GCF of 312, 775, 68
• GCF of 609, 944, 38
• GCF of 684, 661, 25
• GCF of 566, 520, 88
• GCF of 620, 568, 62

1. What is the GCF of 646, 157, 21?

Answer: GCF of 646, 157, 21 is 1.

2. How to Find the GCF of 646, 157, 21

Answer: Greatest Common Factor(GCF) of 646, 157, 21 = 1

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

Step 2: Then multiply all the prime factors GCF(646, 157, 21) = 1.