# Greatest Common Factor of 189 and 191

Make use of GCF Calculator to quickly find the Greatest Common Factor of numbers 189, 191 i.e. 1 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 189 and 191 is 1.

GCF(189,191) = 1

## GCF of 189 and 191

Greatest common factor or Greatest common divisor (GCD) can be calculated in following way;

GCF of:
and

### Greatest Common Factor of 189 and 191 by Prime factorization method

Prime Factorization of 189

 3 189 3 63 3 21 7 7 1

Prime factors of 189 are 3,7. Prime factorization of 189 in exponential form is:

189 = 33×71

Prime Factorization of 191

 191 191 1

Prime factors of 191 are 191. Prime factorization of 191 in exponential form is:

191 = 1911

∴ So by taking common prime factors GCF of 189 and 191 is 1

### Greatest Common Factor of 189 and 191 by matching factors method

Factors of 189

List of positive integer factors of 189 that divides 189 without a remainder.

1,3,7,9,21,27,63,189

Factors of 191

List of positive integer factors of 191 that divides 191 without a remainder.

1,191

Greatest Common Factor

We found the factors and prime factorization of 189 and 191. The biggest common factor number is the GCF number.
So the greatest common factor 189 and 191 is 1.

Also check out the Least Common Multiple of 189 and 191

### Properties of GCF 189 and 191

(i) The GCF of 189 and 191 is associative

GCF of 189 and 191 = GCF of 191 and 189

### Frequently Asked Questions on GCF of 189 and 191

1. What is the GCF of 189 and 191?

Answer: GCF of 189 and 191 is 1.

2. What are the Factors of 189?

Answer: Factors of 189 are 1, 3, 7, 9, 21, 27, 63, 189. There are 8 integers that are factors of 189. The greatest factor of 189 is 189.

3. What are the Factors of 191?

Answer: Factors of 191 are 1, 191. There are 2 integers that are factors of 191. The greatest factor of 191 is 191.

4. How to Find the GCF of 189 and 191?

Greatest Common Factor of 189 and 191 = 1

Step 1: Find the prime factorization of 189

189 = 3 x 3 x 3 x 7

Step 2: Find the prime factorization of 191

191 = 191

Step 3: Multiply those factors both numbers have in common in steps i) or ii) above to find the gcf:

GCF = = 1

Step 4: Therefore, the greatest common factor of 189 and 191 is 1