What is the Greatest Common Factor of 12840 and 12849?

Greatest common factor (GCF) of 12840 and 12849 is 3.

GCF(12840,12849) = 3

We will now calculate the prime factors of 12840 and 12849, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 12840 and 12849.

How to find the GCF of 12840 and 12849?

We will first find the prime factorization of 12840 and 12849. After we will calculate the factors of 12840 and 12849 and find the biggest common factor number .

Step-1: Prime Factorization of 12840

Prime factors of 12840 are 2, 3, 5, 107. Prime factorization of 12840 in exponential form is:

12840 = 2³ × 3¹ × 5¹ × 107¹

Step-2: Prime Factorization of 12849

Prime factors of 12849 are 3, 4283. Prime factorization of 12849 in exponential form is:

12849 = 3¹ × 4283¹

Step-3: Factors of 12840

List of positive integer factors of 12840 that divides 12840 without a remainder.

1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 107, 120, 214, 321, 428, 535, 642, 856, 1070, 1284, 1605, 2140, 2568, 3210, 4280, 6420

Step-4: Factors of 12849

List of positive integer factors of 12849 that divides 12840 without a remainder.

1, 3, 4283

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 12840 and 12849. The biggest common factor number is the GCF number.
So the greatest common factor 12840 and 12849 is 3.

Also check out the Least Common Multiple of 12840 and 12849