Greatest Common Factor of 21, 90, 309

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

• Greatest Common Factor of 21, 90, 309 by common division method
• Greatest Common Factor of 21, 90, 309 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 90

List of positive integer factors of 90 that divides 90 without a remainder.

1,2,3,5,6,9,10,15,18,30,45,90

Factors of 309

List of positive integer factors of 309 that divides 309 without a remainder.

1,3,103,309

Greatest Common Factor

We found the factors 21,90,309 . The biggest common factor number is the GCF number.
So the greatest common factor 21,90,309 is 3.

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

• GCF of 55, 60, 590
• GCF of 92, 59, 628
• GCF of 82, 67, 539
• GCF of 79, 81, 823
• GCF of 36, 61, 544

1. What is the GCF of 21, 90, 309?

Answer: GCF of 21, 90, 309 is 3.

2. How to Find the GCF of 21, 90, 309

Answer: Greatest Common Factor(GCF) of 21, 90, 309 = 3

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

Step 2: Then multiply all the prime factors GCF(21, 90, 309) = 3.