Greatest Common Factor of 21, 22, 99, 165

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

• Greatest Common Factor of 21, 22, 99, 165 by common division method
• Greatest Common Factor of 21, 22, 99, 165 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 22

List of positive integer factors of 22 that divides 22 without a remainder.

1,2,11,22

Factors of 99

List of positive integer factors of 99 that divides 99 without a remainder.

1,3,9,11,33,99

Factors of 165

List of positive integer factors of 165 that divides 165 without a remainder.

1,3,5,11,15,33,55,165

Greatest Common Factor

We found the factors 21,22,99,165 . The biggest common factor number is the GCF number.
So the greatest common factor 21,22,99,165 is 1.

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

• GCF of 90, 59, 51, 385
• GCF of 10, 51, 95, 946
• GCF of 56, 73, 27, 831
• GCF of 12, 57, 23, 535
• GCF of 69, 48, 76, 237

1. What is the GCF of 21, 22, 99, 165?

Answer: GCF of 21, 22, 99, 165 is 1.

2. How to Find the GCF of 21, 22, 99, 165

Answer: Greatest Common Factor(GCF) of 21, 22, 99, 165 = 1

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

Step 2: Then multiply all the prime factors GCF(21, 22, 99, 165) = 1.