Greatest Common Factor of 21, 11, 20, 328

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

• Greatest Common Factor of 21, 11, 20, 328 by common division method
• Greatest Common Factor of 21, 11, 20, 328 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 11

List of positive integer factors of 11 that divides 11 without a remainder.

1,11

Factors of 20

List of positive integer factors of 20 that divides 20 without a remainder.

1,2,4,5,10,20

Factors of 328

List of positive integer factors of 328 that divides 328 without a remainder.

1,2,4,8,41,82,164,328

Greatest Common Factor

We found the factors 21,11,20,328 . The biggest common factor number is the GCF number.
So the greatest common factor 21,11,20,328 is 1.

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

• GCF of 28, 21, 53, 291
• GCF of 95, 48, 57, 426
• GCF of 73, 63, 42, 561
• GCF of 71, 84, 69, 914
• GCF of 70, 88, 70, 796

1. What is the GCF of 21, 11, 20, 328?

Answer: GCF of 21, 11, 20, 328 is 1.

2. How to Find the GCF of 21, 11, 20, 328

Answer: Greatest Common Factor(GCF) of 21, 11, 20, 328 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 11, 20, 328) = 1.