What is the Greatest Common Factor of 18515 and 18520?

Greatest common factor (GCF) of 18515 and 18520 is 5.

GCF(18515,18520) = 5

We will now calculate the prime factors of 18515 and 18520, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 18515 and 18520.

How to find the GCF of 18515 and 18520?

We will first find the prime factorization of 18515 and 18520. After we will calculate the factors of 18515 and 18520 and find the biggest common factor number .

Step-1: Prime Factorization of 18515

Prime factors of 18515 are 5, 7, 23. Prime factorization of 18515 in exponential form is:

18515 = 5¹ × 7¹ × 23²

Step-2: Prime Factorization of 18520

Prime factors of 18520 are 2, 5, 463. Prime factorization of 18520 in exponential form is:

18520 = 2³ × 5¹ × 463¹

Step-3: Factors of 18515

List of positive integer factors of 18515 that divides 18515 without a remainder.

1, 5, 7, 23, 35, 115, 161, 529, 805, 2645, 3703

Step-4: Factors of 18520

List of positive integer factors of 18520 that divides 18515 without a remainder.

1, 2, 4, 5, 8, 10, 20, 40, 463, 926, 1852, 2315, 3704, 4630, 9260

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 18515 and 18520. The biggest common factor number is the GCF number.
So the greatest common factor 18515 and 18520 is 5.

Also check out the Least Common Multiple of 18515 and 18520