What is the Greatest Common Factor of 90015 and 90020?

Greatest common factor (GCF) of 90015 and 90020 is 5.

GCF(90015,90020) = 5

We will now calculate the prime factors of 90015 and 90020, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 90015 and 90020.

How to find the GCF of 90015 and 90020?

We will first find the prime factorization of 90015 and 90020. After we will calculate the factors of 90015 and 90020 and find the biggest common factor number .

Step-1: Prime Factorization of 90015

Prime factors of 90015 are 3, 5, 17, 353. Prime factorization of 90015 in exponential form is:

90015 = 3¹ × 5¹ × 17¹ × 353¹

Step-2: Prime Factorization of 90020

Prime factors of 90020 are 2, 5, 7, 643. Prime factorization of 90020 in exponential form is:

90020 = 2² × 5¹ × 7¹ × 643¹

Step-3: Factors of 90015

List of positive integer factors of 90015 that divides 90015 without a remainder.

1, 3, 5, 15, 17, 51, 85, 255, 353, 1059, 1765, 5295, 6001, 18003, 30005

Step-4: Factors of 90020

List of positive integer factors of 90020 that divides 90015 without a remainder.

1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 643, 1286, 2572, 3215, 4501, 6430, 9002, 12860, 18004, 22505, 45010

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 90015 and 90020. The biggest common factor number is the GCF number.
So the greatest common factor 90015 and 90020 is 5.

Also check out the Least Common Multiple of 90015 and 90020