What is the Greatest Common Factor of 1815 and 1827?

Greatest common factor (GCF) of 1815 and 1827 is 3.

GCF(1815,1827) = 3

We will now calculate the prime factors of 1815 and 1827, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1815 and 1827.

How to find the GCF of 1815 and 1827?

We will first find the prime factorization of 1815 and 1827. After we will calculate the factors of 1815 and 1827 and find the biggest common factor number .

Step-1: Prime Factorization of 1815

Prime factors of 1815 are 3, 5, 11. Prime factorization of 1815 in exponential form is:

1815 = 3¹ × 5¹ × 11²

Step-2: Prime Factorization of 1827

Prime factors of 1827 are 3, 7, 29. Prime factorization of 1827 in exponential form is:

1827 = 3² × 7¹ × 29¹

Step-3: Factors of 1815

List of positive integer factors of 1815 that divides 1815 without a remainder.

1, 3, 5, 11, 15, 33, 55, 121, 165, 363, 605

Step-4: Factors of 1827

List of positive integer factors of 1827 that divides 1815 without a remainder.

1, 3, 7, 9, 21, 29, 63, 87, 203, 261, 609

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1815 and 1827. The biggest common factor number is the GCF number.
So the greatest common factor 1815 and 1827 is 3.

Also check out the Least Common Multiple of 1815 and 1827