What is the Greatest Common Factor of 78442 and 78455?

Greatest common factor (GCF) of 78442 and 78455 is 13.

GCF(78442,78455) = 13

We will now calculate the prime factors of 78442 and 78455, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 78442 and 78455.

How to find the GCF of 78442 and 78455?

We will first find the prime factorization of 78442 and 78455. After we will calculate the factors of 78442 and 78455 and find the biggest common factor number .

Step-1: Prime Factorization of 78442

Prime factors of 78442 are 2, 7, 13, 431. Prime factorization of 78442 in exponential form is:

78442 = 2¹ × 7¹ × 13¹ × 431¹

Step-2: Prime Factorization of 78455

Prime factors of 78455 are 5, 13, 17, 71. Prime factorization of 78455 in exponential form is:

78455 = 5¹ × 13¹ × 17¹ × 71¹

Step-3: Factors of 78442

List of positive integer factors of 78442 that divides 78442 without a remainder.

1, 2, 7, 13, 14, 26, 91, 182, 431, 862, 3017, 5603, 6034, 11206, 39221

Step-4: Factors of 78455

List of positive integer factors of 78455 that divides 78442 without a remainder.

1, 5, 13, 17, 65, 71, 85, 221, 355, 923, 1105, 1207, 4615, 6035, 15691

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 78442 and 78455. The biggest common factor number is the GCF number.
So the greatest common factor 78442 and 78455 is 13.

Also check out the Least Common Multiple of 78442 and 78455