Greatest Common Factor of 21, 18, 180

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

• Greatest Common Factor of 21, 18, 180 by common division method
• Greatest Common Factor of 21, 18, 180 with matching the biggest common factor

Maximum 4 Number can be enter but you can reset

∴ 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 180

List of positive integer factors of 180 that divides 180 without a remainder.

1,2,3,4,5,6,9,10,12,15,18,20,30,36,45,60,90,180

Greatest Common Factor

We found the factors 21,18,180 . The biggest common factor number is the GCF number.
So the greatest common factor 21,18,180 is 3.

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

• GCF of 52, 14, 128
• GCF of 31, 95, 855
• GCF of 70, 90, 452
• GCF of 65, 30, 909
• GCF of 36, 20, 609

1. What is the GCF of 21, 18, 180?

Answer: GCF of 21, 18, 180 is 3.

2. How to Find the GCF of 21, 18, 180

Answer: Greatest Common Factor(GCF) of 21, 18, 180 = 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, 180) = 3.