What is the Greatest Common Factor of 20636 and 20645?

Greatest common factor (GCF) of 20636 and 20645 is 1.

GCF(20636,20645) = 1

We will now calculate the prime factors of 20636 and 20645, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20636 and 20645.

How to find the GCF of 20636 and 20645?

We will first find the prime factorization of 20636 and 20645. After we will calculate the factors of 20636 and 20645 and find the biggest common factor number .

Step-1: Prime Factorization of 20636

Prime factors of 20636 are 2, 7, 11, 67. Prime factorization of 20636 in exponential form is:

20636 = 2² × 7¹ × 11¹ × 67¹

Step-2: Prime Factorization of 20645

Prime factors of 20645 are 5, 4129. Prime factorization of 20645 in exponential form is:

20645 = 5¹ × 4129¹

Step-3: Factors of 20636

List of positive integer factors of 20636 that divides 20636 without a remainder.

1, 2, 4, 7, 11, 14, 22, 28, 44, 67, 77, 134, 154, 268, 308, 469, 737, 938, 1474, 1876, 2948, 5159, 10318

Step-4: Factors of 20645

List of positive integer factors of 20645 that divides 20636 without a remainder.

1, 5, 4129

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20636 and 20645. The biggest common factor number is the GCF number.
So the greatest common factor 20636 and 20645 is 1.

Also check out the Least Common Multiple of 20636 and 20645