What is the Greatest Common Factor of 20687 and 20705?

Greatest common factor (GCF) of 20687 and 20705 is 1.

GCF(20687,20705) = 1

We will now calculate the prime factors of 20687 and 20705, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20687 and 20705.

How to find the GCF of 20687 and 20705?

We will first find the prime factorization of 20687 and 20705. After we will calculate the factors of 20687 and 20705 and find the biggest common factor number .

Step-1: Prime Factorization of 20687

Prime factors of 20687 are 137, 151. Prime factorization of 20687 in exponential form is:

20687 = 137¹ × 151¹

Step-2: Prime Factorization of 20705

Prime factors of 20705 are 5, 41, 101. Prime factorization of 20705 in exponential form is:

20705 = 5¹ × 41¹ × 101¹

Step-3: Factors of 20687

List of positive integer factors of 20687 that divides 20687 without a remainder.

1, 137, 151

Step-4: Factors of 20705

List of positive integer factors of 20705 that divides 20687 without a remainder.

1, 5, 41, 101, 205, 505, 4141

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20687 and 20705. The biggest common factor number is the GCF number.
So the greatest common factor 20687 and 20705 is 1.

Also check out the Least Common Multiple of 20687 and 20705