Greatest Common Factor of 780 and 785

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 780, 785 i.e. 5 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 780 and 785 is 5.

GCF(780,785) = 5

GCF of 780 and 785

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

GCF of:
and

Greatest Common Factor of 780 and 785

GCF of 780 and 785 is 5

Prime Factorization of 780


2 780
2 390
3 195
5 65
13 13
1

Prime factors of 780 are 2,3,5,13. Prime factorization of 780 in exponential form is:

780 = 22×31×51×131

Prime Factorization of 785


5 785
157 157
1

Prime factors of 785 are 5,157. Prime factorization of 785 in exponential form is:

785 = 51×1571

∴ So by taking common prime factors GCF of 780 and 785 is 5

Greatest Common Factor of 780 and 785 by matching factors method

Factors of 780

List of positive integer factors of 780 that divides 780 without a remainder.

1,2,3,4,5,6,10,12,13,15,20,26,30,39,52,60,65,78,130,156,195,260,390,780

Factors of 785

List of positive integer factors of 785 that divides 785 without a remainder.

1,5,157,785

Greatest Common Factor

We found the factors and prime factorization of 780 and 785. The biggest common factor number is the GCF number.
So the greatest common factor 780 and 785 is 5.

Also check out the Least Common Multiple of 780 and 785

Properties of GCF 780 and 785

(i) The GCF of 780 and 785 is associative

GCF of 780 and 785 = GCF of 785 and 780

Related Greatest Common Factor of 780

Related Greatest Common Factor of 785

Frequently Asked Questions on GCF of 780 and 785

1. What is the GCF of 780 and 785?

Answer: GCF of 780 and 785 is 5.

2. What are the Factors of 780?

Answer: Factors of 780 are 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780. There are 24 integers that are factors of 780. The greatest factor of 780 is 780.

3. What are the Factors of 785?

Answer: Factors of 785 are 1, 5, 157, 785. There are 4 integers that are factors of 785. The greatest factor of 785 is 785.

4. How to Find the GCF of 780 and 785?

Answer:

Greatest Common Factor of 780 and 785 = 5

Step 1: Find the prime factorization of 780

780 = 2 x 2 x 3 x 5 x 13

Step 2: Find the prime factorization of 785

785 = 5 x 157

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 780 and 785 is 5