What is the Greatest Common Factor of 20511 and 20515?

Greatest common factor (GCF) of 20511 and 20515 is 1.

GCF(20511,20515) = 1

We will now calculate the prime factors of 20511 and 20515, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20511 and 20515.

How to find the GCF of 20511 and 20515?

We will first find the prime factorization of 20511 and 20515. After we will calculate the factors of 20511 and 20515 and find the biggest common factor number .

Step-1: Prime Factorization of 20511

Prime factors of 20511 are 3, 43, 53. Prime factorization of 20511 in exponential form is:

20511 = 3² × 43¹ × 53¹

Step-2: Prime Factorization of 20515

Prime factors of 20515 are 5, 11, 373. Prime factorization of 20515 in exponential form is:

20515 = 5¹ × 11¹ × 373¹

Step-3: Factors of 20511

List of positive integer factors of 20511 that divides 20511 without a remainder.

1, 3, 9, 43, 53, 129, 159, 387, 477, 2279, 6837

Step-4: Factors of 20515

List of positive integer factors of 20515 that divides 20511 without a remainder.

1, 5, 11, 55, 373, 1865, 4103

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20511 and 20515. The biggest common factor number is the GCF number.
So the greatest common factor 20511 and 20515 is 1.

Also check out the Least Common Multiple of 20511 and 20515