What is the Greatest Common Factor of 20545 and 20556?

Greatest common factor (GCF) of 20545 and 20556 is 1.

GCF(20545,20556) = 1

We will now calculate the prime factors of 20545 and 20556, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20545 and 20556.

How to find the GCF of 20545 and 20556?

We will first find the prime factorization of 20545 and 20556. After we will calculate the factors of 20545 and 20556 and find the biggest common factor number .

Step-1: Prime Factorization of 20545

Prime factors of 20545 are 5, 7, 587. Prime factorization of 20545 in exponential form is:

20545 = 5¹ × 7¹ × 587¹

Step-2: Prime Factorization of 20556

Prime factors of 20556 are 2, 3, 571. Prime factorization of 20556 in exponential form is:

20556 = 2² × 3² × 571¹

Step-3: Factors of 20545

List of positive integer factors of 20545 that divides 20545 without a remainder.

1, 5, 7, 35, 587, 2935, 4109

Step-4: Factors of 20556

List of positive integer factors of 20556 that divides 20545 without a remainder.

1, 2, 3, 4, 6, 9, 12, 18, 36, 571, 1142, 1713, 2284, 3426, 5139, 6852, 10278

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20545 and 20556. The biggest common factor number is the GCF number.
So the greatest common factor 20545 and 20556 is 1.

Also check out the Least Common Multiple of 20545 and 20556