What is the Greatest Common Factor of 78686 and 78690?

Greatest common factor (GCF) of 78686 and 78690 is 2.

GCF(78686,78690) = 2

We will now calculate the prime factors of 78686 and 78690, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 78686 and 78690.

How to find the GCF of 78686 and 78690?

We will first find the prime factorization of 78686 and 78690. After we will calculate the factors of 78686 and 78690 and find the biggest common factor number .

Step-1: Prime Factorization of 78686

Prime factors of 78686 are 2, 39343. Prime factorization of 78686 in exponential form is:

78686 = 2¹ × 39343¹

Step-2: Prime Factorization of 78690

Prime factors of 78690 are 2, 3, 5, 43, 61. Prime factorization of 78690 in exponential form is:

78690 = 2¹ × 3¹ × 5¹ × 43¹ × 61¹

Step-3: Factors of 78686

List of positive integer factors of 78686 that divides 78686 without a remainder.

1, 2, 39343

Step-4: Factors of 78690

List of positive integer factors of 78690 that divides 78686 without a remainder.

1, 2, 3, 5, 6, 10, 15, 30, 43, 61, 86, 122, 129, 183, 215, 258, 305, 366, 430, 610, 645, 915, 1290, 1830, 2623, 5246, 7869, 13115, 15738, 26230, 39345

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 78686 and 78690. The biggest common factor number is the GCF number.
So the greatest common factor 78686 and 78690 is 2.

Also check out the Least Common Multiple of 78686 and 78690