Greatest Common Factor of 21, 64, 63, 891

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

• Greatest Common Factor of 21, 64, 63, 891 by common division method
• Greatest Common Factor of 21, 64, 63, 891 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 64

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

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

Factors of 63

List of positive integer factors of 63 that divides 63 without a remainder.

1,3,7,9,21,63

Factors of 891

List of positive integer factors of 891 that divides 891 without a remainder.

1,3,9,11,27,33,81,99,297,891

Greatest Common Factor

We found the factors 21,64,63,891 . The biggest common factor number is the GCF number.
So the greatest common factor 21,64,63,891 is 1.

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

• GCF of 24, 94, 50, 629
• GCF of 70, 20, 41, 494
• GCF of 90, 64, 63, 374
• GCF of 25, 80, 22, 157
• GCF of 30, 92, 72, 195

1. What is the GCF of 21, 64, 63, 891?

Answer: GCF of 21, 64, 63, 891 is 1.

2. How to Find the GCF of 21, 64, 63, 891

Answer: Greatest Common Factor(GCF) of 21, 64, 63, 891 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 64, 63, 891) = 1.