What is the Greatest Common Factor of 19991 and 20006?

Greatest common factor (GCF) of 19991 and 20006 is 1.

GCF(19991,20006) = 1

We will now calculate the prime factors of 19991 and 20006, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19991 and 20006.

How to find the GCF of 19991 and 20006?

We will first find the prime factorization of 19991 and 20006. After we will calculate the factors of 19991 and 20006 and find the biggest common factor number .

Step-1: Prime Factorization of 19991

Prime factors of 19991 are 19991. Prime factorization of 19991 in exponential form is:

19991 = 19991¹

Step-2: Prime Factorization of 20006

Prime factors of 20006 are 2, 7, 1429. Prime factorization of 20006 in exponential form is:

20006 = 2¹ × 7¹ × 1429¹

Step-3: Factors of 19991

List of positive integer factors of 19991 that divides 19991 without a remainder.

Step-4: Factors of 20006

List of positive integer factors of 20006 that divides 19991 without a remainder.

1, 2, 7, 14, 1429, 2858, 10003

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19991 and 20006. The biggest common factor number is the GCF number.
So the greatest common factor 19991 and 20006 is 1.

Also check out the Least Common Multiple of 19991 and 20006