Greatest Common Factor of 21, 11, 27, 665

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

• Greatest Common Factor of 21, 11, 27, 665 by common division method
• Greatest Common Factor of 21, 11, 27, 665 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 27

List of positive integer factors of 27 that divides 27 without a remainder.

1,3,9,27

Factors of 665

List of positive integer factors of 665 that divides 665 without a remainder.

1,5,7,19,35,95,133,665

Greatest Common Factor

We found the factors 21,11,27,665 . The biggest common factor number is the GCF number.
So the greatest common factor 21,11,27,665 is 1.

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

• GCF of 42, 64, 77, 875
• GCF of 13, 63, 33, 874
• GCF of 79, 82, 84, 318
• GCF of 12, 85, 79, 493
• GCF of 19, 60, 86, 246

1. What is the GCF of 21, 11, 27, 665?

Answer: GCF of 21, 11, 27, 665 is 1.

2. How to Find the GCF of 21, 11, 27, 665

Answer: Greatest Common Factor(GCF) of 21, 11, 27, 665 = 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, 27, 665) = 1.