What is the Greatest Common Factor of 40 and 380?

Greatest common factor (GCF) of 40 and 380 is 20.

GCF(40,380) = 20

We will now calculate the prime factors of 40 and 380, than find the greatest common factor (greatest common divisor (gcd)) of the numbers by matching the biggest common factor of 40 and 380.

How to find the GCF of 40 and 380?

We will first find the prime factorization of 40 and 380. After we will calculate the factors of 40 and 380 and find the biggest common factor number .

Step-1: Prime Factorization of 40

Prime factors of 40 are 2, 5. Prime factorization of 40 in exponential form is:

40 = 2³ × 5¹

Step-2: Prime Factorization of 380

Prime factors of 380 are 2, 5, 19. Prime factorization of 380 in exponential form is:

380 = 2² × 5¹ × 19¹

Step-3: Factors of 40

List of positive integer factors of 40 that divides 40 without a remainder.

1, 2, 4, 5, 8, 10, 20

Step-4: Factors of 380

List of positive integer factors of 380 that divides 40 without a remainder.

1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190

Final Step: Biggest Common Factor Number

We found the factors and prime factorization of 40 and 380. The biggest common factor number is the GCF number.
So the greatest common factor 40 and 380 is 20.

Also check out the Least Common Multiple of 40 and 380