What is the Greatest Common Factor of 12215 and 12220?

Greatest common factor (GCF) of 12215 and 12220 is 5.

GCF(12215,12220) = 5

We will now calculate the prime factors of 12215 and 12220, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12215 and 12220.

How to find the GCF of 12215 and 12220?

We will first find the prime factorization of 12215 and 12220. After we will calculate the factors of 12215 and 12220 and find the biggest common factor number .

Step-1: Prime Factorization of 12215

Prime factors of 12215 are 5, 7, 349. Prime factorization of 12215 in exponential form is:

12215 = 5¹ × 7¹ × 349¹

Step-2: Prime Factorization of 12220

Prime factors of 12220 are 2, 5, 13, 47. Prime factorization of 12220 in exponential form is:

12220 = 2² × 5¹ × 13¹ × 47¹

Step-3: Factors of 12215

List of positive integer factors of 12215 that divides 12215 without a remainder.

1, 5, 7, 35, 349, 1745, 2443

Step-4: Factors of 12220

List of positive integer factors of 12220 that divides 12215 without a remainder.

1, 2, 4, 5, 10, 13, 20, 26, 47, 52, 65, 94, 130, 188, 235, 260, 470, 611, 940, 1222, 2444, 3055, 6110

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12215 and 12220. The biggest common factor number is the GCF number.
So the greatest common factor 12215 and 12220 is 5.

Also check out the Least Common Multiple of 12215 and 12220