Greatest Common Factor of 315, 408, 21

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

• Greatest Common Factor of 315, 408, 21 by common division method
• Greatest Common Factor of 315, 408, 21 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 315

List of positive integer factors of 315 that divides 315 without a remainder.

1,3,5,7,9,15,21,35,45,63,105,315

Factors of 408

List of positive integer factors of 408 that divides 408 without a remainder.

1,2,3,4,6,8,12,17,24,34,51,68,102,136,204,408

Factors of 21

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

1,3,7,21

Greatest Common Factor

We found the factors 315,408,21 . The biggest common factor number is the GCF number.
So the greatest common factor 315,408,21 is 3.

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

• GCF of 531, 139, 47
• GCF of 710, 280, 24
• GCF of 548, 614, 63
• GCF of 579, 963, 87
• GCF of 940, 274, 29

1. What is the GCF of 315, 408, 21?

Answer: GCF of 315, 408, 21 is 3.

2. How to Find the GCF of 315, 408, 21

Answer: Greatest Common Factor(GCF) of 315, 408, 21 = 3

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

Step 2: Then multiply all the prime factors GCF(315, 408, 21) = 3.