What is the Greatest Common Factor of 78020 and 78040?

Greatest common factor (GCF) of 78020 and 78040 is 20.

GCF(78020,78040) = 20

We will now calculate the prime factors of 78020 and 78040, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 78020 and 78040.

How to find the GCF of 78020 and 78040?

We will first find the prime factorization of 78020 and 78040. After we will calculate the factors of 78020 and 78040 and find the biggest common factor number .

Step-1: Prime Factorization of 78020

Prime factors of 78020 are 2, 5, 47, 83. Prime factorization of 78020 in exponential form is:

78020 = 2² × 5¹ × 47¹ × 83¹

Step-2: Prime Factorization of 78040

Prime factors of 78040 are 2, 5, 1951. Prime factorization of 78040 in exponential form is:

78040 = 2³ × 5¹ × 1951¹

Step-3: Factors of 78020

List of positive integer factors of 78020 that divides 78020 without a remainder.

1, 2, 4, 5, 10, 20, 47, 83, 94, 166, 188, 235, 332, 415, 470, 830, 940, 1660, 3901, 7802, 15604, 19505, 39010

Step-4: Factors of 78040

List of positive integer factors of 78040 that divides 78020 without a remainder.

1, 2, 4, 5, 8, 10, 20, 40, 1951, 3902, 7804, 9755, 15608, 19510, 39020

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 78020 and 78040. The biggest common factor number is the GCF number.
So the greatest common factor 78020 and 78040 is 20.

Also check out the Least Common Multiple of 78020 and 78040