GCF of two or more numbers Calculator allows you to quickly calculate the GCF of 9, 21, 63 i.e. 3 largest integer that divides all the numbers equally.

Greatest common factor (GCF) of 9, 21, 63 is **3**.

GCF(9, 21, 63) = 3

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

- Greatest Common Factor of 9, 21, 63 by common division method
- Greatest Common Factor of 9, 21, 63 with matching the biggest common factor

3 | 9, 21, 63 |

3, 7, 21 |

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

**Factors of 9**

List of positive integer factors of 9 that divides 9 without a remainder.

1,3,9

**Factors of 21**

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

1,3,7,21

**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 9,21,63 . The biggest common factor number is the **GCF** number.

So the **greatest common factor 9,21,63 ** is **3**.

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

1. What is the GCF of 9, 21, 63?

Answer: GCF of 9, 21, 63 is 3.

2. How to Find the GCF of 9, 21, 63

Answer: Greatest Common Factor(GCF) of 9, 21, 63 = 3

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

Step 2: Then multiply all the prime factors GCF(9, 21, 63) = 3.