Greatest Common Factor of 21, 12, 585

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

• Greatest Common Factor of 21, 12, 585 by common division method
• Greatest Common Factor of 21, 12, 585 with matching the biggest common factor

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∴ So the GCF of the given numbers is 3 = 3

Factors of 21

List of positive integer factors of 21 that divides 21 without a remainder.

1,3,7,21

Factors of 12

List of positive integer factors of 12 that divides 12 without a remainder.

1,2,3,4,6,12

Factors of 585

List of positive integer factors of 585 that divides 585 without a remainder.

1,3,5,9,13,15,39,45,65,117,195,585

Greatest Common Factor

We found the factors 21,12,585 . The biggest common factor number is the GCF number.
So the greatest common factor 21,12,585 is 3.

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

• GCF of 69, 78, 526
• GCF of 83, 74, 795
• GCF of 34, 80, 949
• GCF of 79, 64, 704
• GCF of 51, 57, 891

1. What is the GCF of 21, 12, 585?

Answer: GCF of 21, 12, 585 is 3.

2. How to Find the GCF of 21, 12, 585

Answer: Greatest Common Factor(GCF) of 21, 12, 585 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 12, 585) = 3.