Greatest Common Factor of 64, 21, 72, 646

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

• Greatest Common Factor of 64, 21, 72, 646 by common division method
• Greatest Common Factor of 64, 21, 72, 646 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 64

List of positive integer factors of 64 that divides 64 without a remainder.

1,2,4,8,16,32,64

Factors of 21

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

1,3,7,21

Factors of 72

List of positive integer factors of 72 that divides 72 without a remainder.

1,2,3,4,6,8,9,12,18,24,36,72

Factors of 646

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

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

Greatest Common Factor

We found the factors 64,21,72,646 . The biggest common factor number is the GCF number.
So the greatest common factor 64,21,72,646 is 1.

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

• GCF of 55, 34, 21, 872
• GCF of 36, 86, 13, 613
• GCF of 26, 54, 24, 748
• GCF of 80, 73, 76, 847
• GCF of 36, 11, 91, 879

1. What is the GCF of 64, 21, 72, 646?

Answer: GCF of 64, 21, 72, 646 is 1.

2. How to Find the GCF of 64, 21, 72, 646

Answer: Greatest Common Factor(GCF) of 64, 21, 72, 646 = 1

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

Step 2: Then multiply all the prime factors GCF(64, 21, 72, 646) = 1.