Greatest Common Factor of 285 and 290

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 285, 290 i.e. 5 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 285 and 290 is 5.

GCF(285,290) = 5

GCF of 285 and 290

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

GCF of:
and

Greatest Common Factor of 285 and 290

GCF of 285 and 290 is 5

Prime Factorization of 285


3 285
5 95
19 19
1

Prime factors of 285 are 3,5,19. Prime factorization of 285 in exponential form is:

285 = 31×51×191

Prime Factorization of 290


2 290
5 145
29 29
1

Prime factors of 290 are 2,5,29. Prime factorization of 290 in exponential form is:

290 = 21×51×291

∴ So by taking common prime factors GCF of 285 and 290 is 5

Greatest Common Factor of 285 and 290 by matching factors method

Factors of 285

List of positive integer factors of 285 that divides 285 without a remainder.

1,3,5,15,19,57,95,285

Factors of 290

List of positive integer factors of 290 that divides 290 without a remainder.

1,2,5,10,29,58,145,290

Greatest Common Factor

We found the factors and prime factorization of 285 and 290. The biggest common factor number is the GCF number.
So the greatest common factor 285 and 290 is 5.

Also check out the Least Common Multiple of 285 and 290

Properties of GCF 285 and 290

(i) The GCF of 285 and 290 is associative

GCF of 285 and 290 = GCF of 290 and 285

Related Greatest Common Factor of 285

Related Greatest Common Factor of 290

Frequently Asked Questions on GCF of 285 and 290

1. What is the GCF of 285 and 290?

Answer: GCF of 285 and 290 is 5.

2. What are the Factors of 285?

Answer: Factors of 285 are 1, 3, 5, 15, 19, 57, 95, 285. There are 8 integers that are factors of 285. The greatest factor of 285 is 285.

3. What are the Factors of 290?

Answer: Factors of 290 are 1, 2, 5, 10, 29, 58, 145, 290. There are 8 integers that are factors of 290. The greatest factor of 290 is 290.

4. How to Find the GCF of 285 and 290?

Answer:

Greatest Common Factor of 285 and 290 = 5

Step 1: Find the prime factorization of 285

285 = 3 x 5 x 19

Step 2: Find the prime factorization of 290

290 = 2 x 5 x 29

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

GCF = 5

Step 4: Therefore, the greatest common factor of 285 and 290 is 5