What is the Greatest Common Factor of 19905 and 19918?

Greatest common factor (GCF) of 19905 and 19918 is 1.

GCF(19905,19918) = 1

We will now calculate the prime factors of 19905 and 19918, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 19905 and 19918.

How to find the GCF of 19905 and 19918?

We will first find the prime factorization of 19905 and 19918. After we will calculate the factors of 19905 and 19918 and find the biggest common factor number .

Step-1: Prime Factorization of 19905

Prime factors of 19905 are 3, 5, 1327. Prime factorization of 19905 in exponential form is:

19905 = 3¹ × 5¹ × 1327¹

Step-2: Prime Factorization of 19918

Prime factors of 19918 are 2, 23, 433. Prime factorization of 19918 in exponential form is:

19918 = 2¹ × 23¹ × 433¹

Step-3: Factors of 19905

List of positive integer factors of 19905 that divides 19905 without a remainder.

1, 3, 5, 15, 1327, 3981, 6635

Step-4: Factors of 19918

List of positive integer factors of 19918 that divides 19905 without a remainder.

1, 2, 23, 46, 433, 866, 9959

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 19905 and 19918. The biggest common factor number is the GCF number.
So the greatest common factor 19905 and 19918 is 1.

Also check out the Least Common Multiple of 19905 and 19918