GCD of 642, 475, 390, 378 Calculator

Given Input numbers are 642, 475, 390, 378

To find the GCD of numbers using factoring list out all the divisors of each number

Divisors of 642

List of positive integer divisors of 642 that divides 642 without a remainder.

1, 2, 3, 6, 107, 214, 321, 642

Divisors of 475

List of positive integer divisors of 475 that divides 475 without a remainder.

1, 5, 19, 25, 95, 475

Divisors of 390

List of positive integer divisors of 390 that divides 390 without a remainder.

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

Divisors of 378

List of positive integer divisors of 378 that divides 378 without a remainder.

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

Greatest Common Divisior

We found the divisors of 642, 475, 390, 378 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 642, 475, 390, 378 is 1.

Therefore, GCD of numbers 642, 475, 390, 378 is 1

Given Input Data is 642, 475, 390, 378

Make a list of Prime Factors of all the given numbers initially

Prime Factorization of 642 is 2 x 3 x 107

Prime Factorization of 475 is 5 x 5 x 19

Prime Factorization of 390 is 2 x 3 x 5 x 13

Prime Factorization of 378 is 2 x 3 x 3 x 3 x 7

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

Step1:

Let's calculate the GCD of first two numbers

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

LCM(642, 475) = 304950

GCD(642, 475) = ( 642 x 475 ) / 304950

GCD(642, 475) = 304950 / 304950

GCD(642, 475) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 390

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

LCM(1, 390) = 390

GCD(1, 390) = ( 1 x 390 ) / 390

GCD(1, 390) = 390 / 390

GCD(1, 390) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 378

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

LCM(1, 378) = 378

GCD(1, 378) = ( 1 x 378 ) / 378

GCD(1, 378) = 378 / 378

GCD(1, 378) = 1

GCD of 642, 475, 390, 378 is 1

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1. What is the GCD of 642, 475, 390, 378?

GCD of 642, 475, 390, 378 is 1

2. Where do I get the detailed procedure to find GCD of 642, 475, 390, 378?

You can find a detailed procedure to find GCD of 642, 475, 390, 378 on our page.

3. How to find GCD of 642, 475, 390, 378 on a calculator?

You can find the GCD of 642, 475, 390, 378 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.