What is the Greatest Common Factor of 12885 and 12905?

Greatest common factor (GCF) of 12885 and 12905 is 5.

GCF(12885,12905) = 5

We will now calculate the prime factors of 12885 and 12905, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12885 and 12905.

How to find the GCF of 12885 and 12905?

We will first find the prime factorization of 12885 and 12905. After we will calculate the factors of 12885 and 12905 and find the biggest common factor number .

Step-1: Prime Factorization of 12885

Prime factors of 12885 are 3, 5, 859. Prime factorization of 12885 in exponential form is:

12885 = 3¹ × 5¹ × 859¹

Step-2: Prime Factorization of 12905

Prime factors of 12905 are 5, 29, 89. Prime factorization of 12905 in exponential form is:

12905 = 5¹ × 29¹ × 89¹

Step-3: Factors of 12885

List of positive integer factors of 12885 that divides 12885 without a remainder.

1, 3, 5, 15, 859, 2577, 4295

Step-4: Factors of 12905

List of positive integer factors of 12905 that divides 12885 without a remainder.

1, 5, 29, 89, 145, 445, 2581

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12885 and 12905. The biggest common factor number is the GCF number.
So the greatest common factor 12885 and 12905 is 5.

Also check out the Least Common Multiple of 12885 and 12905