What is the Greatest Common Factor of 215 and 231?

Greatest common factor (GCF) of 215 and 231 is 1.

GCF(215,231) = 1

We will now calculate the prime factors of 215 and 231, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 215 and 231.

How to find the GCF of 215 and 231?

We will first find the prime factorization of 215 and 231. After we will calculate the factors of 215 and 231 and find the biggest common factor number .

Step-1: Prime Factorization of 215

Prime factors of 215 are 5, 43. Prime factorization of 215 in exponential form is:

215 = 5¹ × 43¹

Step-2: Prime Factorization of 231

Prime factors of 231 are 3, 7, 11. Prime factorization of 231 in exponential form is:

231 = 3¹ × 7¹ × 11¹

Step-3: Factors of 215

List of positive integer factors of 215 that divides 215 without a remainder.

1, 5, 43

Step-4: Factors of 231

List of positive integer factors of 231 that divides 215 without a remainder.

1, 3, 7, 11, 21, 33, 77

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 215 and 231. The biggest common factor number is the GCF number.
So the greatest common factor 215 and 231 is 1.

Also check out the Least Common Multiple of 215 and 231