What is the Greatest Common Factor of 9990 and 10001?

Greatest common factor (GCF) of 9990 and 10001 is 1.

GCF(9990,10001) = 1

We will now calculate the prime factors of 9990 and 10001, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 9990 and 10001.

How to find the GCF of 9990 and 10001?

We will first find the prime factorization of 9990 and 10001. After we will calculate the factors of 9990 and 10001 and find the biggest common factor number .

Step-1: Prime Factorization of 9990

Prime factors of 9990 are 2, 3, 5, 37. Prime factorization of 9990 in exponential form is:

9990 = 2¹ × 3³ × 5¹ × 37¹

Step-2: Prime Factorization of 10001

Prime factors of 10001 are 73, 137. Prime factorization of 10001 in exponential form is:

10001 = 73¹ × 137¹

Step-3: Factors of 9990

List of positive integer factors of 9990 that divides 9990 without a remainder.

1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 37, 45, 54, 74, 90, 111, 135, 185, 222, 270, 333, 370, 555, 666, 999, 1110, 1665, 1998, 3330, 4995

Step-4: Factors of 10001

List of positive integer factors of 10001 that divides 9990 without a remainder.

1, 73, 137

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 9990 and 10001. The biggest common factor number is the GCF number.
So the greatest common factor 9990 and 10001 is 1.

Also check out the Least Common Multiple of 9990 and 10001