GCD of 42, 623, 855, 817 Calculator

Given Input numbers are 42, 623, 855, 817

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

Divisors of 42

List of positive integer divisors of 42 that divides 42 without a remainder.

1, 2, 3, 6, 7, 14, 21, 42

Divisors of 623

List of positive integer divisors of 623 that divides 623 without a remainder.

1, 7, 89, 623

Divisors of 855

List of positive integer divisors of 855 that divides 855 without a remainder.

1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285, 855

Divisors of 817

List of positive integer divisors of 817 that divides 817 without a remainder.

1, 19, 43, 817

Greatest Common Divisior

We found the divisors of 42, 623, 855, 817 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 42, 623, 855, 817 is 1.

Therefore, GCD of numbers 42, 623, 855, 817 is 1

Given Input Data is 42, 623, 855, 817

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

Prime Factorization of 42 is 2 x 3 x 7

Prime Factorization of 623 is 7 x 89

Prime Factorization of 855 is 3 x 3 x 5 x 19

Prime Factorization of 817 is 19 x 43

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(42, 623) = 3738

GCD(42, 623) = ( 42 x 623 ) / 3738

GCD(42, 623) = 26166 / 3738

GCD(42, 623) = 7

Step2:

Here we consider the GCD from the above i.e. 7 as first number and the next as 855

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

LCM(7, 855) = 5985

GCD(7, 855) = ( 7 x 855 ) / 5985

GCD(7, 855) = 5985 / 5985

GCD(7, 855) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 817

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

LCM(1, 817) = 817

GCD(1, 817) = ( 1 x 817 ) / 817

GCD(1, 817) = 817 / 817

GCD(1, 817) = 1

GCD of 42, 623, 855, 817 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 20, 935, 356, 949
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• GCD of 81, 860, 355, 857

1. What is the GCD of 42, 623, 855, 817?

GCD of 42, 623, 855, 817 is 1

2. Where do I get the detailed procedure to find GCD of 42, 623, 855, 817?

You can find a detailed procedure to find GCD of 42, 623, 855, 817 on our page.

3. How to find GCD of 42, 623, 855, 817 on a calculator?

You can find the GCD of 42, 623, 855, 817 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.