What is the Greatest Common Factor of 12270 and 12280?

Greatest common factor (GCF) of 12270 and 12280 is 10.

GCF(12270,12280) = 10

We will now calculate the prime factors of 12270 and 12280, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12270 and 12280.

How to find the GCF of 12270 and 12280?

We will first find the prime factorization of 12270 and 12280. After we will calculate the factors of 12270 and 12280 and find the biggest common factor number .

Step-1: Prime Factorization of 12270

Prime factors of 12270 are 2, 3, 5, 409. Prime factorization of 12270 in exponential form is:

12270 = 2¹ × 3¹ × 5¹ × 409¹

Step-2: Prime Factorization of 12280

Prime factors of 12280 are 2, 5, 307. Prime factorization of 12280 in exponential form is:

12280 = 2³ × 5¹ × 307¹

Step-3: Factors of 12270

List of positive integer factors of 12270 that divides 12270 without a remainder.

1, 2, 3, 5, 6, 10, 15, 30, 409, 818, 1227, 2045, 2454, 4090, 6135

Step-4: Factors of 12280

List of positive integer factors of 12280 that divides 12270 without a remainder.

1, 2, 4, 5, 8, 10, 20, 40, 307, 614, 1228, 1535, 2456, 3070, 6140

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12270 and 12280. The biggest common factor number is the GCF number.
So the greatest common factor 12270 and 12280 is 10.

Also check out the Least Common Multiple of 12270 and 12280