What is the Greatest Common Factor of 15990 and 15998?

Greatest common factor (GCF) of 15990 and 15998 is 2.

GCF(15990,15998) = 2

We will now calculate the prime factors of 15990 and 15998, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 15990 and 15998.

How to find the GCF of 15990 and 15998?

We will first find the prime factorization of 15990 and 15998. After we will calculate the factors of 15990 and 15998 and find the biggest common factor number .

Step-1: Prime Factorization of 15990

Prime factors of 15990 are 2, 3, 5, 13, 41. Prime factorization of 15990 in exponential form is:

15990 = 2¹ × 3¹ × 5¹ × 13¹ × 41¹

Step-2: Prime Factorization of 15998

Prime factors of 15998 are 2, 19, 421. Prime factorization of 15998 in exponential form is:

15998 = 2¹ × 19¹ × 421¹

Step-3: Factors of 15990

List of positive integer factors of 15990 that divides 15990 without a remainder.

1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 41, 65, 78, 82, 123, 130, 195, 205, 246, 390, 410, 533, 615, 1066, 1230, 1599, 2665, 3198, 5330, 7995

Step-4: Factors of 15998

List of positive integer factors of 15998 that divides 15990 without a remainder.

1, 2, 19, 38, 421, 842, 7999

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 15990 and 15998. The biggest common factor number is the GCF number.
So the greatest common factor 15990 and 15998 is 2.

Also check out the Least Common Multiple of 15990 and 15998