What is the Greatest Common Factor of 2181 and 2187?

Greatest common factor (GCF) of 2181 and 2187 is 3.

GCF(2181,2187) = 3

We will now calculate the prime factors of 2181 and 2187, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 2181 and 2187.

How to find the GCF of 2181 and 2187?

We will first find the prime factorization of 2181 and 2187. After we will calculate the factors of 2181 and 2187 and find the biggest common factor number .

Step-1: Prime Factorization of 2181

Prime factors of 2181 are 3, 727. Prime factorization of 2181 in exponential form is:

2181 = 3¹ × 727¹

Step-2: Prime Factorization of 2187

Prime factors of 2187 are 3. Prime factorization of 2187 in exponential form is:

2187 = 3⁷

Step-3: Factors of 2181

List of positive integer factors of 2181 that divides 2181 without a remainder.

1, 3, 727

Step-4: Factors of 2187

List of positive integer factors of 2187 that divides 2181 without a remainder.

1, 3, 9, 27, 81, 243, 729

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 2181 and 2187. The biggest common factor number is the GCF number.
So the greatest common factor 2181 and 2187 is 3.

Also check out the Least Common Multiple of 2181 and 2187