Greatest Common Factor of 15 and 19

Created By : Jatin Gogia

Reviewed By : Rajasekhar Valipishetty

Last Updated : Apr 06, 2023

Make use of GCF Calculator to quickly find the Greatest Common Factor of numbers 15, 19 i.e. 1 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 15 and 19 is 1.

GCF(15,19) = 1

GCF of 15 and 19

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

GCF of:
and

Greatest Common Factor of 15 and 19

GCF of 15 and 19 is 1

Prime Factorization of 15


3 15
5 5
1

Prime factors of 15 are 3,5. Prime factorization of 15 in exponential form is:

15 = 31×51

Prime Factorization of 19


19 19
1

Prime factors of 19 are 19. Prime factorization of 19 in exponential form is:

19 = 191

∴ So by taking common prime factors GCF of 15 and 19 is 1

Greatest Common Factor of 15 and 19 by matching factors method

Factors of 15

List of positive integer factors of 15 that divides 15 without a remainder.

1,3,5,15

Factors of 19

List of positive integer factors of 19 that divides 19 without a remainder.

1,19

Greatest Common Factor

We found the factors and prime factorization of 15 and 19. The biggest common factor number is the GCF number.
So the greatest common factor 15 and 19 is 1.

Also check out the Least Common Multiple of 15 and 19

Properties of GCF 15 and 19

(i) The GCF of 15 and 19 is associative

GCF of 15 and 19 = GCF of 19 and 15

Related Greatest Common Factor of 15

Related Greatest Common Factor of 19

Frequently Asked Questions on GCF of 15 and 19

1. What is the GCF of 15 and 19?

Answer: GCF of 15 and 19 is 1.

2. What are the Factors of 15?

Answer: Factors of 15 are 1, 3, 5, 15. There are 4 integers that are factors of 15. The greatest factor of 15 is 15.

3. What are the Factors of 19?

Answer: Factors of 19 are 1, 19. There are 2 integers that are factors of 19. The greatest factor of 19 is 19.

4. How to Find the GCF of 15 and 19?

Answer:

Greatest Common Factor of 15 and 19 = 1

Step 1: Find the prime factorization of 15

15 = 3 x 5

Step 2: Find the prime factorization of 19

19 = 19

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 15 and 19 is 1