Greatest Common Factor of 21, 30, 65, 204

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

• Greatest Common Factor of 21, 30, 65, 204 by common division method
• Greatest Common Factor of 21, 30, 65, 204 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 30

List of positive integer factors of 30 that divides 30 without a remainder.

1,2,3,5,6,10,15,30

Factors of 65

List of positive integer factors of 65 that divides 65 without a remainder.

1,5,13,65

Factors of 204

List of positive integer factors of 204 that divides 204 without a remainder.

1,2,3,4,6,12,17,34,51,68,102,204

Greatest Common Factor

We found the factors 21,30,65,204 . The biggest common factor number is the GCF number.
So the greatest common factor 21,30,65,204 is 1.

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

• GCF of 29, 46, 77, 864
• GCF of 71, 12, 91, 397
• GCF of 62, 97, 14, 351
• GCF of 30, 83, 28, 364
• GCF of 95, 51, 58, 727

1. What is the GCF of 21, 30, 65, 204?

Answer: GCF of 21, 30, 65, 204 is 1.

2. How to Find the GCF of 21, 30, 65, 204

Answer: Greatest Common Factor(GCF) of 21, 30, 65, 204 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 30, 65, 204) = 1.