What is the Greatest Common Factor of 20485 and 20489?

Greatest common factor (GCF) of 20485 and 20489 is 1.

GCF(20485,20489) = 1

We will now calculate the prime factors of 20485 and 20489, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20485 and 20489.

How to find the GCF of 20485 and 20489?

We will first find the prime factorization of 20485 and 20489. After we will calculate the factors of 20485 and 20489 and find the biggest common factor number .

Step-1: Prime Factorization of 20485

Prime factors of 20485 are 5, 17, 241. Prime factorization of 20485 in exponential form is:

20485 = 5¹ × 17¹ × 241¹

Step-2: Prime Factorization of 20489

Prime factors of 20489 are 7, 2927. Prime factorization of 20489 in exponential form is:

20489 = 7¹ × 2927¹

Step-3: Factors of 20485

List of positive integer factors of 20485 that divides 20485 without a remainder.

1, 5, 17, 85, 241, 1205, 4097

Step-4: Factors of 20489

List of positive integer factors of 20489 that divides 20485 without a remainder.

1, 7, 2927

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20485 and 20489. The biggest common factor number is the GCF number.
So the greatest common factor 20485 and 20489 is 1.

Also check out the Least Common Multiple of 20485 and 20489