What is the Greatest Common Factor of 20686 and 20706?

Greatest common factor (GCF) of 20686 and 20706 is 2.

GCF(20686,20706) = 2

We will now calculate the prime factors of 20686 and 20706, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 20686 and 20706.

How to find the GCF of 20686 and 20706?

We will first find the prime factorization of 20686 and 20706. After we will calculate the factors of 20686 and 20706 and find the biggest common factor number .

Step-1: Prime Factorization of 20686

Prime factors of 20686 are 2, 10343. Prime factorization of 20686 in exponential form is:

20686 = 2¹ × 10343¹

Step-2: Prime Factorization of 20706

Prime factors of 20706 are 2, 3, 7, 17, 29. Prime factorization of 20706 in exponential form is:

20706 = 2¹ × 3¹ × 7¹ × 17¹ × 29¹

Step-3: Factors of 20686

List of positive integer factors of 20686 that divides 20686 without a remainder.

1, 2, 10343

Step-4: Factors of 20706

List of positive integer factors of 20706 that divides 20686 without a remainder.

1, 2, 3, 6, 7, 14, 17, 21, 29, 34, 42, 51, 58, 87, 102, 119, 174, 203, 238, 357, 406, 493, 609, 714, 986, 1218, 1479, 2958, 3451, 6902, 10353

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 20686 and 20706. The biggest common factor number is the GCF number.
So the greatest common factor 20686 and 20706 is 2.

Also check out the Least Common Multiple of 20686 and 20706