What is the Greatest Common Factor of 12155 and 12170?

Greatest common factor (GCF) of 12155 and 12170 is 5.

GCF(12155,12170) = 5

We will now calculate the prime factors of 12155 and 12170, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12155 and 12170.

How to find the GCF of 12155 and 12170?

We will first find the prime factorization of 12155 and 12170. After we will calculate the factors of 12155 and 12170 and find the biggest common factor number .

Step-1: Prime Factorization of 12155

Prime factors of 12155 are 5, 11, 13, 17. Prime factorization of 12155 in exponential form is:

12155 = 5¹ × 11¹ × 13¹ × 17¹

Step-2: Prime Factorization of 12170

Prime factors of 12170 are 2, 5, 1217. Prime factorization of 12170 in exponential form is:

12170 = 2¹ × 5¹ × 1217¹

Step-3: Factors of 12155

List of positive integer factors of 12155 that divides 12155 without a remainder.

1, 5, 11, 13, 17, 55, 65, 85, 143, 187, 221, 715, 935, 1105, 2431

Step-4: Factors of 12170

List of positive integer factors of 12170 that divides 12155 without a remainder.

1, 2, 5, 10, 1217, 2434, 6085

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12155 and 12170. The biggest common factor number is the GCF number.
So the greatest common factor 12155 and 12170 is 5.

Also check out the Least Common Multiple of 12155 and 12170