What is the Greatest Common Factor of 1272 and 1287?

Greatest common factor (GCF) of 1272 and 1287 is 3.

GCF(1272,1287) = 3

We will now calculate the prime factors of 1272 and 1287, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1272 and 1287.

How to find the GCF of 1272 and 1287?

We will first find the prime factorization of 1272 and 1287. After we will calculate the factors of 1272 and 1287 and find the biggest common factor number .

Step-1: Prime Factorization of 1272

Prime factors of 1272 are 2, 3, 53. Prime factorization of 1272 in exponential form is:

1272 = 2³ × 3¹ × 53¹

Step-2: Prime Factorization of 1287

Prime factors of 1287 are 3, 11, 13. Prime factorization of 1287 in exponential form is:

1287 = 3² × 11¹ × 13¹

Step-3: Factors of 1272

List of positive integer factors of 1272 that divides 1272 without a remainder.

1, 2, 3, 4, 6, 8, 12, 24, 53, 106, 159, 212, 318, 424, 636

Step-4: Factors of 1287

List of positive integer factors of 1287 that divides 1272 without a remainder.

1, 3, 9, 11, 13, 33, 39, 99, 117, 143, 429

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1272 and 1287. The biggest common factor number is the GCF number.
So the greatest common factor 1272 and 1287 is 3.

Also check out the Least Common Multiple of 1272 and 1287