What is the Greatest Common Factor of 30981 and 30990?

Greatest common factor (GCF) of 30981 and 30990 is 3.

GCF(30981,30990) = 3

We will now calculate the prime factors of 30981 and 30990, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 30981 and 30990.

How to find the GCF of 30981 and 30990?

We will first find the prime factorization of 30981 and 30990. After we will calculate the factors of 30981 and 30990 and find the biggest common factor number .

Step-1: Prime Factorization of 30981

Prime factors of 30981 are 3, 23, 449. Prime factorization of 30981 in exponential form is:

30981 = 3¹ × 23¹ × 449¹

Step-2: Prime Factorization of 30990

Prime factors of 30990 are 2, 3, 5, 1033. Prime factorization of 30990 in exponential form is:

30990 = 2¹ × 3¹ × 5¹ × 1033¹

Step-3: Factors of 30981

List of positive integer factors of 30981 that divides 30981 without a remainder.

1, 3, 23, 69, 449, 1347, 10327

Step-4: Factors of 30990

List of positive integer factors of 30990 that divides 30981 without a remainder.

1, 2, 3, 5, 6, 10, 15, 30, 1033, 2066, 3099, 5165, 6198, 10330, 15495

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 30981 and 30990. The biggest common factor number is the GCF number.
So the greatest common factor 30981 and 30990 is 3.

Also check out the Least Common Multiple of 30981 and 30990