GCD of 243, 845, 42, 399 Calculator

Given Input numbers are 243, 845, 42, 399

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

Divisors of 243

List of positive integer divisors of 243 that divides 243 without a remainder.

1, 3, 9, 27, 81, 243

Divisors of 845

List of positive integer divisors of 845 that divides 845 without a remainder.

1, 5, 13, 65, 169, 845

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 399

List of positive integer divisors of 399 that divides 399 without a remainder.

1, 3, 7, 19, 21, 57, 133, 399

Greatest Common Divisior

We found the divisors of 243, 845, 42, 399 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 243, 845, 42, 399 is 1.

Therefore, GCD of numbers 243, 845, 42, 399 is 1

Given Input Data is 243, 845, 42, 399

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

Prime Factorization of 243 is 3 x 3 x 3 x 3 x 3

Prime Factorization of 845 is 5 x 13 x 13

Prime Factorization of 42 is 2 x 3 x 7

Prime Factorization of 399 is 3 x 7 x 19

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(243, 845) = 205335

GCD(243, 845) = ( 243 x 845 ) / 205335

GCD(243, 845) = 205335 / 205335

GCD(243, 845) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 42

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

LCM(1, 42) = 42

GCD(1, 42) = ( 1 x 42 ) / 42

GCD(1, 42) = 42 / 42

GCD(1, 42) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 399

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

LCM(1, 399) = 399

GCD(1, 399) = ( 1 x 399 ) / 399

GCD(1, 399) = 399 / 399

GCD(1, 399) = 1

GCD of 243, 845, 42, 399 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 129, 131, 83, 807
• GCD of 254, 457, 25, 595
• GCD of 769, 434, 45, 307
• GCD of 138, 991, 80, 671
• GCD of 582, 261, 41, 655

1. What is the GCD of 243, 845, 42, 399?

GCD of 243, 845, 42, 399 is 1

2. Where do I get the detailed procedure to find GCD of 243, 845, 42, 399?

You can find a detailed procedure to find GCD of 243, 845, 42, 399 on our page.

3. How to find GCD of 243, 845, 42, 399 on a calculator?

You can find the GCD of 243, 845, 42, 399 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.