Greatest Common Factor of 819 and 821

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 819, 821 i.e. 1 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 819 and 821 is 1.

GCF(819,821) = 1

GCF of 819 and 821

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

GCF of:
and

Greatest Common Factor of 819 and 821

GCF of 819 and 821 is 1

Prime Factorization of 819


3 819
3 273
7 91
13 13
1

Prime factors of 819 are 3,7,13. Prime factorization of 819 in exponential form is:

819 = 32×71×131

Prime Factorization of 821


821 821
1

Prime factors of 821 are 821. Prime factorization of 821 in exponential form is:

821 = 8211

∴ So by taking common prime factors GCF of 819 and 821 is 1

Greatest Common Factor of 819 and 821 by matching factors method

Factors of 819

List of positive integer factors of 819 that divides 819 without a remainder.

1,3,7,9,13,21,39,63,91,117,273,819

Factors of 821

List of positive integer factors of 821 that divides 821 without a remainder.

1,821

Greatest Common Factor

We found the factors and prime factorization of 819 and 821. The biggest common factor number is the GCF number.
So the greatest common factor 819 and 821 is 1.

Also check out the Least Common Multiple of 819 and 821

Properties of GCF 819 and 821

(i) The GCF of 819 and 821 is associative

GCF of 819 and 821 = GCF of 821 and 819

Related Greatest Common Factor of 819

Related Greatest Common Factor of 821

Frequently Asked Questions on GCF of 819 and 821

1. What is the GCF of 819 and 821?

Answer: GCF of 819 and 821 is 1.

2. What are the Factors of 819?

Answer: Factors of 819 are 1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819. There are 12 integers that are factors of 819. The greatest factor of 819 is 819.

3. What are the Factors of 821?

Answer: Factors of 821 are 1, 821. There are 2 integers that are factors of 821. The greatest factor of 821 is 821.

4. How to Find the GCF of 819 and 821?

Answer:

Greatest Common Factor of 819 and 821 = 1

Step 1: Find the prime factorization of 819

819 = 3 x 3 x 7 x 13

Step 2: Find the prime factorization of 821

821 = 821

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 819 and 821 is 1