What is the Greatest Common Factor of 78440 and 78445?

Greatest common factor (GCF) of 78440 and 78445 is 5.

GCF(78440,78445) = 5

We will now calculate the prime factors of 78440 and 78445, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 78440 and 78445.

How to find the GCF of 78440 and 78445?

We will first find the prime factorization of 78440 and 78445. After we will calculate the factors of 78440 and 78445 and find the biggest common factor number .

Step-1: Prime Factorization of 78440

Prime factors of 78440 are 2, 5, 37, 53. Prime factorization of 78440 in exponential form is:

78440 = 2³ × 5¹ × 37¹ × 53¹

Step-2: Prime Factorization of 78445

Prime factors of 78445 are 5, 29, 541. Prime factorization of 78445 in exponential form is:

78445 = 5¹ × 29¹ × 541¹

Step-3: Factors of 78440

List of positive integer factors of 78440 that divides 78440 without a remainder.

1, 2, 4, 5, 8, 10, 20, 37, 40, 53, 74, 106, 148, 185, 212, 265, 296, 370, 424, 530, 740, 1060, 1480, 1961, 2120, 3922, 7844, 9805, 15688, 19610, 39220

Step-4: Factors of 78445

List of positive integer factors of 78445 that divides 78440 without a remainder.

1, 5, 29, 145, 541, 2705, 15689

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 78440 and 78445. The biggest common factor number is the GCF number.
So the greatest common factor 78440 and 78445 is 5.

Also check out the Least Common Multiple of 78440 and 78445