Greatest Common Factor of 390 and 393

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 390, 393 i.e. 3 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 390 and 393 is 3.

GCF(390,393) = 3

GCF of 390 and 393

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

GCF of:
and

Greatest Common Factor of 390 and 393

GCF of 390 and 393 is 3

Prime Factorization of 390


2 390
3 195
5 65
13 13
1

Prime factors of 390 are 2,3,5,13. Prime factorization of 390 in exponential form is:

390 = 21×31×51×131

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

∴ So by taking common prime factors GCF of 390 and 393 is 3

Greatest Common Factor of 390 and 393 by matching factors method

Factors of 390

List of positive integer factors of 390 that divides 390 without a remainder.

1,2,3,5,6,10,13,15,26,30,39,65,78,130,195,390

Factors of 393

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

1,3,131,393

Greatest Common Factor

We found the factors and prime factorization of 390 and 393. The biggest common factor number is the GCF number.
So the greatest common factor 390 and 393 is 3.

Also check out the Least Common Multiple of 390 and 393

Properties of GCF 390 and 393

(i) The GCF of 390 and 393 is associative

GCF of 390 and 393 = GCF of 393 and 390

Related Greatest Common Factor of 390

Related Greatest Common Factor of 393

Frequently Asked Questions on GCF of 390 and 393

1. What is the GCF of 390 and 393?

Answer: GCF of 390 and 393 is 3.

2. What are the Factors of 390?

Answer: Factors of 390 are 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390. There are 16 integers that are factors of 390. The greatest factor of 390 is 390.

3. 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.

4. How to Find the GCF of 390 and 393?

Answer:

Greatest Common Factor of 390 and 393 = 3

Step 1: Find the prime factorization of 390

390 = 2 x 3 x 5 x 13

Step 2: Find the prime factorization of 393

393 = 3 x 131

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 390 and 393 is 3