# Greatest Common Factor of 66, 21, 39, 63

GCF of two or more numbers Calculator allows you to quickly calculate the GCF of 66, 21, 39, 63 i.e. 3 largest integer that divides all the numbers equally.

Greatest common factor (GCF) of 66, 21, 39, 63 is 3.

GCF(66, 21, 39, 63) = 3

## GCF of 66, 21, 39, 63

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

GCF of:

### Greatest Common Factor (GCF) of 66,21,39,63 By Common Division

 3 66, 21, 39, 63 22, 7, 13, 21

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

### Greatest Common Factor (GCF) By Matching Biggest Common Factor Method

Factors of 66

List of positive integer factors of 66 that divides 66 without a remainder.

1,2,3,6,11,22,33,66

Factors of 21

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

1,3,7,21

Factors of 39

List of positive integer factors of 39 that divides 39 without a remainder.

1,3,13,39

Factors of 63

List of positive integer factors of 63 that divides 63 without a remainder.

1,3,7,9,21,63

Greatest Common Factor

We found the factors 66,21,39,63 . The biggest common factor number is the GCF number.
So the greatest common factor 66,21,39,63 is 3.

### GCF of two or more Numbers Calculation Examples

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

### Frequently Asked Questions on GCF of 66, 21, 39, 63

1. What is the GCF of 66, 21, 39, 63?

Answer: GCF of 66, 21, 39, 63 is 3.

2. How to Find the GCF of 66, 21, 39, 63

Answer: Greatest Common Factor(GCF) of 66, 21, 39, 63 = 3

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

Step 2: Then multiply all the prime factors GCF(66, 21, 39, 63) = 3.