Greatest Common Factor of 21, 90, 64, 631

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

• Greatest Common Factor of 21, 90, 64, 631 by common division method
• Greatest Common Factor of 21, 90, 64, 631 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 90

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

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 631

List of positive integer factors of 631 that divides 631 without a remainder.

1,631

Greatest Common Factor

We found the factors 21,90,64,631 . The biggest common factor number is the GCF number.
So the greatest common factor 21,90,64,631 is 1.

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

• GCF of 18, 16, 29, 897
• GCF of 40, 31, 97, 172
• GCF of 48, 58, 15, 848
• GCF of 21, 10, 44, 988
• GCF of 17, 75, 95, 399

1. What is the GCF of 21, 90, 64, 631?

Answer: GCF of 21, 90, 64, 631 is 1.

2. How to Find the GCF of 21, 90, 64, 631

Answer: Greatest Common Factor(GCF) of 21, 90, 64, 631 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 90, 64, 631) = 1.