Greatest Common Factor of 817 and 820

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 817, 820 i.e. 1 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 817 and 820 is 1.

GCF(817,820) = 1

GCF of 817 and 820

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

GCF of:
and

Greatest Common Factor of 817 and 820

GCF of 817 and 820 is 1

Prime Factorization of 817


19 817
43 43
1

Prime factors of 817 are 19,43. Prime factorization of 817 in exponential form is:

817 = 191×431

Prime Factorization of 820


2 820
2 410
5 205
41 41
1

Prime factors of 820 are 2,5,41. Prime factorization of 820 in exponential form is:

820 = 22×51×411

∴ So by taking common prime factors GCF of 817 and 820 is 1

Greatest Common Factor of 817 and 820 by matching factors method

Factors of 817

List of positive integer factors of 817 that divides 817 without a remainder.

1,19,43,817

Factors of 820

List of positive integer factors of 820 that divides 820 without a remainder.

1,2,4,5,10,20,41,82,164,205,410,820

Greatest Common Factor

We found the factors and prime factorization of 817 and 820. The biggest common factor number is the GCF number.
So the greatest common factor 817 and 820 is 1.

Also check out the Least Common Multiple of 817 and 820

Properties of GCF 817 and 820

(i) The GCF of 817 and 820 is associative

GCF of 817 and 820 = GCF of 820 and 817

Related Greatest Common Factor of 817

Related Greatest Common Factor of 820

Frequently Asked Questions on GCF of 817 and 820

1. What is the GCF of 817 and 820?

Answer: GCF of 817 and 820 is 1.

2. What are the Factors of 817?

Answer: Factors of 817 are 1, 19, 43, 817. There are 4 integers that are factors of 817. The greatest factor of 817 is 817.

3. What are the Factors of 820?

Answer: Factors of 820 are 1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820. There are 12 integers that are factors of 820. The greatest factor of 820 is 820.

4. How to Find the GCF of 817 and 820?

Answer:

Greatest Common Factor of 817 and 820 = 1

Step 1: Find the prime factorization of 817

817 = 19 x 43

Step 2: Find the prime factorization of 820

820 = 2 x 2 x 5 x 41

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 817 and 820 is 1