Greatest Common Factor of 21, 86, 165

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

• Greatest Common Factor of 21, 86, 165 by common division method
• Greatest Common Factor of 21, 86, 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 86

List of positive integer factors of 86 that divides 86 without a remainder.

1,2,43,86

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 21,86,165 . The biggest common factor number is the GCF number.
So the greatest common factor 21,86,165 is 1.

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

• GCF of 98, 86, 578
• GCF of 97, 32, 254
• GCF of 10, 56, 722
• GCF of 64, 73, 818
• GCF of 60, 46, 924

1. What is the GCF of 21, 86, 165?

Answer: GCF of 21, 86, 165 is 1.

2. How to Find the GCF of 21, 86, 165

Answer: Greatest Common Factor(GCF) of 21, 86, 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, 86, 165) = 1.