Greatest Common Factor of 21, 18, 30, 564

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

• Greatest Common Factor of 21, 18, 30, 564 by common division method
• Greatest Common Factor of 21, 18, 30, 564 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 18

List of positive integer factors of 18 that divides 18 without a remainder.

1,2,3,6,9,18

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 564

List of positive integer factors of 564 that divides 564 without a remainder.

1,2,3,4,6,12,47,94,141,188,282,564

Greatest Common Factor

We found the factors 21,18,30,564 . The biggest common factor number is the GCF number.
So the greatest common factor 21,18,30,564 is 3.

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

• GCF of 48, 28, 89, 894
• GCF of 13, 29, 55, 756
• GCF of 89, 38, 16, 941
• GCF of 46, 40, 64, 398
• GCF of 16, 55, 59, 568

1. What is the GCF of 21, 18, 30, 564?

Answer: GCF of 21, 18, 30, 564 is 3.

2. How to Find the GCF of 21, 18, 30, 564

Answer: Greatest Common Factor(GCF) of 21, 18, 30, 564 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 18, 30, 564) = 3.