Greatest Common Factor of 393 and 399

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 393, 399 i.e. 3 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 393 and 399 is 3.

GCF(393,399) = 3

GCF of 393 and 399

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

GCF of:
and

Greatest Common Factor of 393 and 399

GCF of 393 and 399 is 3

Prime Factorization of 393


3 393
131 131
1

Prime factors of 393 are 3,131. Prime factorization of 393 in exponential form is:

393 = 31×1311

Prime Factorization of 399


3 399
7 133
19 19
1

Prime factors of 399 are 3,7,19. Prime factorization of 399 in exponential form is:

399 = 31×71×191

∴ So by taking common prime factors GCF of 393 and 399 is 3

Greatest Common Factor of 393 and 399 by matching factors method

Factors of 393

List of positive integer factors of 393 that divides 393 without a remainder.

1,3,131,393

Factors of 399

List of positive integer factors of 399 that divides 399 without a remainder.

1,3,7,19,21,57,133,399

Greatest Common Factor

We found the factors and prime factorization of 393 and 399. The biggest common factor number is the GCF number.
So the greatest common factor 393 and 399 is 3.

Also check out the Least Common Multiple of 393 and 399

Properties of GCF 393 and 399

(i) The GCF of 393 and 399 is associative

GCF of 393 and 399 = GCF of 399 and 393

Related Greatest Common Factor of 393

Related Greatest Common Factor of 399

Frequently Asked Questions on GCF of 393 and 399

1. What is the GCF of 393 and 399?

Answer: GCF of 393 and 399 is 3.

2. What are the Factors of 393?

Answer: Factors of 393 are 1, 3, 131, 393. There are 4 integers that are factors of 393. The greatest factor of 393 is 393.

3. What are the Factors of 399?

Answer: Factors of 399 are 1, 3, 7, 19, 21, 57, 133, 399. There are 8 integers that are factors of 399. The greatest factor of 399 is 399.

4. How to Find the GCF of 393 and 399?

Answer:

Greatest Common Factor of 393 and 399 = 3

Step 1: Find the prime factorization of 393

393 = 3 x 131

Step 2: Find the prime factorization of 399

399 = 3 x 7 x 19

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

GCF = 3

Step 4: Therefore, the greatest common factor of 393 and 399 is 3