Greatest Common Factor of 1805 and 1809

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 1805, 1809 i.e. 1 largest integer by which both the numbers can be divided.

Greatest common factor (GCF) of 1805 and 1809 is 1.

GCF(1805,1809) = 1

GCF of 1805 and 1809

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

GCF of:
and

Greatest Common Factor of 1805 and 1809

GCF of 1805 and 1809 is 1

Prime Factorization of 1805


5 1805
19 361
19 19
1

Prime factors of 1805 are 5,19. Prime factorization of 1805 in exponential form is:

1805 = 51×192

Prime Factorization of 1809


3 1809
3 603
3 201
67 67
1

Prime factors of 1809 are 3,67. Prime factorization of 1809 in exponential form is:

1809 = 33×671

∴ So by taking common prime factors GCF of 1805 and 1809 is 1

Greatest Common Factor of 1805 and 1809 by matching factors method

Factors of 1805

List of positive integer factors of 1805 that divides 1805 without a remainder.

1,5,19,95,361,1805

Factors of 1809

List of positive integer factors of 1809 that divides 1809 without a remainder.

1,3,9,27,67,201,603,1809

Greatest Common Factor

We found the factors and prime factorization of 1805 and 1809. The biggest common factor number is the GCF number.
So the greatest common factor 1805 and 1809 is 1.

Also check out the Least Common Multiple of 1805 and 1809

Properties of GCF 1805 and 1809

(i) The GCF of 1805 and 1809 is associative

GCF of 1805 and 1809 = GCF of 1809 and 1805

Related Greatest Common Factor of 1805

Related Greatest Common Factor of 1809

Frequently Asked Questions on GCF of 1805 and 1809

1. What is the GCF of 1805 and 1809?

Answer: GCF of 1805 and 1809 is 1.

2. What are the Factors of 1805?

Answer: Factors of 1805 are 1, 5, 19, 95, 361, 1805. There are 6 integers that are factors of 1805. The greatest factor of 1805 is 1805.

3. What are the Factors of 1809?

Answer: Factors of 1809 are 1, 3, 9, 27, 67, 201, 603, 1809. There are 8 integers that are factors of 1809. The greatest factor of 1809 is 1809.

4. How to Find the GCF of 1805 and 1809?

Answer:

Greatest Common Factor of 1805 and 1809 = 1

Step 1: Find the prime factorization of 1805

1805 = 5 x 19 x 19

Step 2: Find the prime factorization of 1809

1809 = 3 x 3 x 3 x 67

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 1805 and 1809 is 1