What is the Greatest Common Factor of 20439 and 20455?

Greatest common factor (GCF) of 20439 and 20455 is 1.

GCF(20439,20455) = 1

We will now calculate the prime factors of 20439 and 20455, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20439 and 20455.

How to find the GCF of 20439 and 20455?

We will first find the prime factorization of 20439 and 20455. After we will calculate the factors of 20439 and 20455 and find the biggest common factor number .

Step-1: Prime Factorization of 20439

Prime factors of 20439 are 3, 757. Prime factorization of 20439 in exponential form is:

20439 = 3³ × 757¹

Step-2: Prime Factorization of 20455

Prime factors of 20455 are 5, 4091. Prime factorization of 20455 in exponential form is:

20455 = 5¹ × 4091¹

Step-3: Factors of 20439

List of positive integer factors of 20439 that divides 20439 without a remainder.

1, 3, 9, 27, 757, 2271, 6813

Step-4: Factors of 20455

List of positive integer factors of 20455 that divides 20439 without a remainder.

1, 5, 4091

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20439 and 20455. The biggest common factor number is the GCF number.
So the greatest common factor 20439 and 20455 is 1.

Also check out the Least Common Multiple of 20439 and 20455