What is the Greatest Common Factor of 31521 and 31528?

Greatest common factor (GCF) of 31521 and 31528 is 7.

GCF(31521,31528) = 7

We will now calculate the prime factors of 31521 and 31528, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 31521 and 31528.

How to find the GCF of 31521 and 31528?

We will first find the prime factorization of 31521 and 31528. After we will calculate the factors of 31521 and 31528 and find the biggest common factor number .

Step-1: Prime Factorization of 31521

Prime factors of 31521 are 3, 7, 19, 79. Prime factorization of 31521 in exponential form is:

31521 = 3¹ × 7¹ × 19¹ × 79¹

Step-2: Prime Factorization of 31528

Prime factors of 31528 are 2, 7, 563. Prime factorization of 31528 in exponential form is:

31528 = 2³ × 7¹ × 563¹

Step-3: Factors of 31521

List of positive integer factors of 31521 that divides 31521 without a remainder.

1, 3, 7, 19, 21, 57, 79, 133, 237, 399, 553, 1501, 1659, 4503, 10507

Step-4: Factors of 31528

List of positive integer factors of 31528 that divides 31521 without a remainder.

1, 2, 4, 7, 8, 14, 28, 56, 563, 1126, 2252, 3941, 4504, 7882, 15764

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 31521 and 31528. The biggest common factor number is the GCF number.
So the greatest common factor 31521 and 31528 is 7.

Also check out the Least Common Multiple of 31521 and 31528