What is the Greatest Common Factor of 20540 and 20555?

Greatest common factor (GCF) of 20540 and 20555 is 5.

GCF(20540,20555) = 5

We will now calculate the prime factors of 20540 and 20555, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20540 and 20555.

How to find the GCF of 20540 and 20555?

We will first find the prime factorization of 20540 and 20555. After we will calculate the factors of 20540 and 20555 and find the biggest common factor number .

Step-1: Prime Factorization of 20540

Prime factors of 20540 are 2, 5, 13, 79. Prime factorization of 20540 in exponential form is:

20540 = 2² × 5¹ × 13¹ × 79¹

Step-2: Prime Factorization of 20555

Prime factors of 20555 are 5, 4111. Prime factorization of 20555 in exponential form is:

20555 = 5¹ × 4111¹

Step-3: Factors of 20540

List of positive integer factors of 20540 that divides 20540 without a remainder.

1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 79, 130, 158, 260, 316, 395, 790, 1027, 1580, 2054, 4108, 5135, 10270

Step-4: Factors of 20555

List of positive integer factors of 20555 that divides 20540 without a remainder.

1, 5, 4111

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20540 and 20555. The biggest common factor number is the GCF number.
So the greatest common factor 20540 and 20555 is 5.

Also check out the Least Common Multiple of 20540 and 20555