What is the Greatest Common Factor of 20001 and 20005?

Greatest common factor (GCF) of 20001 and 20005 is 1.

GCF(20001,20005) = 1

We will now calculate the prime factors of 20001 and 20005, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20001 and 20005.

How to find the GCF of 20001 and 20005?

We will first find the prime factorization of 20001 and 20005. After we will calculate the factors of 20001 and 20005 and find the biggest common factor number .

Step-1: Prime Factorization of 20001

Prime factors of 20001 are 3, 59, 113. Prime factorization of 20001 in exponential form is:

20001 = 3¹ × 59¹ × 113¹

Step-2: Prime Factorization of 20005

Prime factors of 20005 are 5, 4001. Prime factorization of 20005 in exponential form is:

20005 = 5¹ × 4001¹

Step-3: Factors of 20001

List of positive integer factors of 20001 that divides 20001 without a remainder.

1, 3, 59, 113, 177, 339, 6667

Step-4: Factors of 20005

List of positive integer factors of 20005 that divides 20001 without a remainder.

1, 5, 4001

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20001 and 20005. The biggest common factor number is the GCF number.
So the greatest common factor 20001 and 20005 is 1.

Also check out the Least Common Multiple of 20001 and 20005