What is the Greatest Common Factor of 1267 and 1287?

Greatest common factor (GCF) of 1267 and 1287 is 1.

GCF(1267,1287) = 1

We will now calculate the prime factors of 1267 and 1287, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1267 and 1287.

How to find the GCF of 1267 and 1287?

We will first find the prime factorization of 1267 and 1287. After we will calculate the factors of 1267 and 1287 and find the biggest common factor number .

Step-1: Prime Factorization of 1267

Prime factors of 1267 are 7, 181. Prime factorization of 1267 in exponential form is:

1267 = 7¹ × 181¹

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 1267

List of positive integer factors of 1267 that divides 1267 without a remainder.

1, 7, 181

Step-4: Factors of 1287

List of positive integer factors of 1287 that divides 1267 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 1267 and 1287. The biggest common factor number is the GCF number.
So the greatest common factor 1267 and 1287 is 1.

Also check out the Least Common Multiple of 1267 and 1287