What is the Greatest Common Factor of 1422 and 1428?

Greatest common factor (GCF) of 1422 and 1428 is 6.

GCF(1422,1428) = 6

We will now calculate the prime factors of 1422 and 1428, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 1422 and 1428.

How to find the GCF of 1422 and 1428?

We will first find the prime factorization of 1422 and 1428. After we will calculate the factors of 1422 and 1428 and find the biggest common factor number .

Step-1: Prime Factorization of 1422

Prime factors of 1422 are 2, 3, 79. Prime factorization of 1422 in exponential form is:

1422 = 2¹ × 3² × 79¹

Step-2: Prime Factorization of 1428

Prime factors of 1428 are 2, 3, 7, 17. Prime factorization of 1428 in exponential form is:

1428 = 2² × 3¹ × 7¹ × 17¹

Step-3: Factors of 1422

List of positive integer factors of 1422 that divides 1422 without a remainder.

1, 2, 3, 6, 9, 18, 79, 158, 237, 474, 711

Step-4: Factors of 1428

List of positive integer factors of 1428 that divides 1422 without a remainder.

1, 2, 3, 4, 6, 7, 12, 14, 17, 21, 28, 34, 42, 51, 68, 84, 102, 119, 204, 238, 357, 476, 714

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 1422 and 1428. The biggest common factor number is the GCF number.
So the greatest common factor 1422 and 1428 is 6.

Also check out the Least Common Multiple of 1422 and 1428