# Greatest Common Factor of 45, 63, 81

GCF of two or more numbers Calculator allows you to quickly calculate the GCF of 45, 63, 81 i.e. 9 largest integer that divides all the numbers equally.

Greatest common factor (GCF) of 45, 63, 81 is 9.

GCF(45, 63, 81) = 9

## GCF of 45, 63, 81

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

GCF of:

### Greatest Common Factor (GCF) of 45,63,81 By Common Division

 3 45, 63, 81 3 15, 21, 27 5, 7, 9

∴ So the GCF of the given numbers is 3 x 3 = 9

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

Factors of 45

List of positive integer factors of 45 that divides 45 without a remainder.

1,3,5,9,15,45

Factors of 63

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

1,3,7,9,21,63

Factors of 81

List of positive integer factors of 81 that divides 81 without a remainder.

1,3,9,27,81

Greatest Common Factor

We found the factors 45,63,81 . The biggest common factor number is the GCF number.
So the greatest common factor 45,63,81 is 9.

### 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 45, 63, 81

1. What is the GCF of 45, 63, 81?

Answer: GCF of 45, 63, 81 is 9.

2. How to Find the GCF of 45, 63, 81

Answer: Greatest Common Factor(GCF) of 45, 63, 81 = 9

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

Step 2: Then multiply all the prime factors GCF(45, 63, 81) = 9.