GCD of 815, 390, 780, 378 Calculator

Given Input numbers are 815, 390, 780, 378

In the factoring method, we have to find the divisors of all numbers

Divisors of 815 :

The positive integer divisors of 815 that completely divides 815 are.

1, 5, 163, 815

Divisors of 390 :

The positive integer divisors of 390 that completely divides 390 are.

1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390

Divisors of 780 :

The positive integer divisors of 780 that completely divides 780 are.

1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780

Divisors of 378 :

The positive integer divisors of 378 that completely divides 378 are.

1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 189, 378

GCD of numbers is the greatest common divisor

So, the GCD (815, 390, 780, 378) = 1.

Given numbers are 815, 390, 780, 378

The list of prime factors of all numbers are

Prime factors of 815 are 5 x 163

Prime factors of 390 are 2 x 3 x 5 x 13

Prime factors of 780 are 2 x 2 x 3 x 5 x 13

Prime factors of 378 are 2 x 3 x 3 x 3 x 7

The above numbers do not have any common prime factor. So GCD is 1

Given numbers are 815, 390, 780, 378

GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)

Apply this formula for all numbers.

Step1:

LCM(815, 390) = 63570

GCD(815, 390) = ( 815 x 390 ) / 63570

= 815 / 390

= 815

Step2:

LCM(5, 780) = 780

GCD(5, 780) = ( 5 x 780 ) / 780

= 5 / 780

= 5

Step3:

LCM(5, 378) = 1890

GCD(5, 378) = ( 5 x 378 ) / 1890

= 5 / 378

= 5

So, Greatest Common Divisor of 815, 390, 780, 378 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 665, 953, 663, 599
• GCD of 831, 372, 572, 378
• GCD of 933, 156, 823, 839
• GCD of 405, 335, 475, 903
• GCD of 759, 171, 549, 112

Given numbers are 815, 390, 780, 378
The greatest common divisor of numbers 815, 390, 780, 378 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 815, 390, 780, 378 is 1.

1. What is the GCD of 815, 390, 780, 378?

GCD of given numbers 815, 390, 780, 378 is 1

2. How to calculate the greatest common divisor of 815, 390, 780, 378?

We can find the highest common divisor of 815, 390, 780, 378 easily using the prime factorization method. Just list the prime factors of all numbers and pick the highest common factor which is the GCD of 815, 390, 780, 378 i.e 1.

3. How can I use the GCD of 815, 390, 780, 378Calculator?

Out the numbers 815, 390, 780, 378 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.