What is the Greatest Common Factor of 20115 and 20120?

Greatest common factor (GCF) of 20115 and 20120 is 5.

GCF(20115,20120) = 5

We will now calculate the prime factors of 20115 and 20120, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20115 and 20120.

How to find the GCF of 20115 and 20120?

We will first find the prime factorization of 20115 and 20120. After we will calculate the factors of 20115 and 20120 and find the biggest common factor number .

Step-1: Prime Factorization of 20115

Prime factors of 20115 are 3, 5, 149. Prime factorization of 20115 in exponential form is:

20115 = 3³ × 5¹ × 149¹

Step-2: Prime Factorization of 20120

Prime factors of 20120 are 2, 5, 503. Prime factorization of 20120 in exponential form is:

20120 = 2³ × 5¹ × 503¹

Step-3: Factors of 20115

List of positive integer factors of 20115 that divides 20115 without a remainder.

1, 3, 5, 9, 15, 27, 45, 135, 149, 447, 745, 1341, 2235, 4023, 6705

Step-4: Factors of 20120

List of positive integer factors of 20120 that divides 20115 without a remainder.

1, 2, 4, 5, 8, 10, 20, 40, 503, 1006, 2012, 2515, 4024, 5030, 10060

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20115 and 20120. The biggest common factor number is the GCF number.
So the greatest common factor 20115 and 20120 is 5.

Also check out the Least Common Multiple of 20115 and 20120