What is the Greatest Common Factor of 19891 and 19900?

Greatest common factor (GCF) of 19891 and 19900 is 1.

GCF(19891,19900) = 1

We will now calculate the prime factors of 19891 and 19900, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19891 and 19900.

How to find the GCF of 19891 and 19900?

We will first find the prime factorization of 19891 and 19900. After we will calculate the factors of 19891 and 19900 and find the biggest common factor number .

Step-1: Prime Factorization of 19891

Prime factors of 19891 are 19891. Prime factorization of 19891 in exponential form is:

19891 = 19891¹

Step-2: Prime Factorization of 19900

Prime factors of 19900 are 2, 5, 199. Prime factorization of 19900 in exponential form is:

19900 = 2² × 5² × 199¹

Step-3: Factors of 19891

List of positive integer factors of 19891 that divides 19891 without a remainder.

Step-4: Factors of 19900

List of positive integer factors of 19900 that divides 19891 without a remainder.

1, 2, 4, 5, 10, 20, 25, 50, 100, 199, 398, 796, 995, 1990, 3980, 4975, 9950

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19891 and 19900. The biggest common factor number is the GCF number.
So the greatest common factor 19891 and 19900 is 1.

Also check out the Least Common Multiple of 19891 and 19900