What is the Greatest Common Factor of 20197 and 20205?

Greatest common factor (GCF) of 20197 and 20205 is 1.

GCF(20197,20205) = 1

We will now calculate the prime factors of 20197 and 20205, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20197 and 20205.

How to find the GCF of 20197 and 20205?

We will first find the prime factorization of 20197 and 20205. After we will calculate the factors of 20197 and 20205 and find the biggest common factor number .

Step-1: Prime Factorization of 20197

Prime factors of 20197 are 19, 1063. Prime factorization of 20197 in exponential form is:

20197 = 19¹ × 1063¹

Step-2: Prime Factorization of 20205

Prime factors of 20205 are 3, 5, 449. Prime factorization of 20205 in exponential form is:

20205 = 3² × 5¹ × 449¹

Step-3: Factors of 20197

List of positive integer factors of 20197 that divides 20197 without a remainder.

1, 19, 1063

Step-4: Factors of 20205

List of positive integer factors of 20205 that divides 20197 without a remainder.

1, 3, 5, 9, 15, 45, 449, 1347, 2245, 4041, 6735

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20197 and 20205. The biggest common factor number is the GCF number.
So the greatest common factor 20197 and 20205 is 1.

Also check out the Least Common Multiple of 20197 and 20205