What is the Greatest Common Factor of 12155 and 12172?

Greatest common factor (GCF) of 12155 and 12172 is 17.

GCF(12155,12172) = 17

We will now calculate the prime factors of 12155 and 12172, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12155 and 12172.

How to find the GCF of 12155 and 12172?

We will first find the prime factorization of 12155 and 12172. After we will calculate the factors of 12155 and 12172 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 12172

Prime factors of 12172 are 2, 17, 179. Prime factorization of 12172 in exponential form is:

12172 = 2² × 17¹ × 179¹

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 12172

List of positive integer factors of 12172 that divides 12155 without a remainder.

1, 2, 4, 17, 34, 68, 179, 358, 716, 3043, 6086

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12155 and 12172. The biggest common factor number is the GCF number.
So the greatest common factor 12155 and 12172 is 17.

Also check out the Least Common Multiple of 12155 and 12172