What is the Greatest Common Factor of 20885 and 20905?

Greatest common factor (GCF) of 20885 and 20905 is 5.

GCF(20885,20905) = 5

We will now calculate the prime factors of 20885 and 20905, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20885 and 20905.

How to find the GCF of 20885 and 20905?

We will first find the prime factorization of 20885 and 20905. After we will calculate the factors of 20885 and 20905 and find the biggest common factor number .

Step-1: Prime Factorization of 20885

Prime factors of 20885 are 5, 4177. Prime factorization of 20885 in exponential form is:

20885 = 5¹ × 4177¹

Step-2: Prime Factorization of 20905

Prime factors of 20905 are 5, 37, 113. Prime factorization of 20905 in exponential form is:

20905 = 5¹ × 37¹ × 113¹

Step-3: Factors of 20885

List of positive integer factors of 20885 that divides 20885 without a remainder.

1, 5, 4177

Step-4: Factors of 20905

List of positive integer factors of 20905 that divides 20885 without a remainder.

1, 5, 37, 113, 185, 565, 4181

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20885 and 20905. The biggest common factor number is the GCF number.
So the greatest common factor 20885 and 20905 is 5.

Also check out the Least Common Multiple of 20885 and 20905