Greatest Common Factor of 21, 37, 640

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

• Greatest Common Factor of 21, 37, 640 by common division method
• Greatest Common Factor of 21, 37, 640 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 37

List of positive integer factors of 37 that divides 37 without a remainder.

1,37

Factors of 640

List of positive integer factors of 640 that divides 640 without a remainder.

1,2,4,5,8,10,16,20,32,40,64,80,128,160,320,640

Greatest Common Factor

We found the factors 21,37,640 . The biggest common factor number is the GCF number.
So the greatest common factor 21,37,640 is 1.

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

• GCF of 37, 76, 453
• GCF of 69, 79, 596
• GCF of 52, 71, 195
• GCF of 11, 52, 349
• GCF of 12, 53, 794

1. What is the GCF of 21, 37, 640?

Answer: GCF of 21, 37, 640 is 1.

2. How to Find the GCF of 21, 37, 640

Answer: Greatest Common Factor(GCF) of 21, 37, 640 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 37, 640) = 1.