What is the Greatest Common Factor of 1431 and 1443?

Greatest common factor (GCF) of 1431 and 1443 is 3.

GCF(1431,1443) = 3

We will now calculate the prime factors of 1431 and 1443, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1431 and 1443.

How to find the GCF of 1431 and 1443?

We will first find the prime factorization of 1431 and 1443. After we will calculate the factors of 1431 and 1443 and find the biggest common factor number .

Step-1: Prime Factorization of 1431

Prime factors of 1431 are 3, 53. Prime factorization of 1431 in exponential form is:

1431 = 3³ × 53¹

Step-2: Prime Factorization of 1443

Prime factors of 1443 are 3, 13, 37. Prime factorization of 1443 in exponential form is:

1443 = 3¹ × 13¹ × 37¹

Step-3: Factors of 1431

List of positive integer factors of 1431 that divides 1431 without a remainder.

1, 3, 9, 27, 53, 159, 477

Step-4: Factors of 1443

List of positive integer factors of 1443 that divides 1431 without a remainder.

1, 3, 13, 37, 39, 111, 481

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1431 and 1443. The biggest common factor number is the GCF number.
So the greatest common factor 1431 and 1443 is 3.

Also check out the Least Common Multiple of 1431 and 1443