GCD of 815, 332, 138, 643 Calculator

Given Input numbers are 815, 332, 138, 643

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

Divisors of 815

List of positive integer divisors of 815 that divides 815 without a remainder.

1, 5, 163, 815

Divisors of 332

List of positive integer divisors of 332 that divides 332 without a remainder.

1, 2, 4, 83, 166, 332

Divisors of 138

List of positive integer divisors of 138 that divides 138 without a remainder.

1, 2, 3, 6, 23, 46, 69, 138

Divisors of 643

List of positive integer divisors of 643 that divides 643 without a remainder.

1, 643

Greatest Common Divisior

We found the divisors of 815, 332, 138, 643 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 815, 332, 138, 643 is 1.

Therefore, GCD of numbers 815, 332, 138, 643 is 1

Given Input Data is 815, 332, 138, 643

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

Prime Factorization of 815 is 5 x 163

Prime Factorization of 332 is 2 x 2 x 83

Prime Factorization of 138 is 2 x 3 x 23

Prime Factorization of 643 is 643

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(815, 332) = 270580

GCD(815, 332) = ( 815 x 332 ) / 270580

GCD(815, 332) = 270580 / 270580

GCD(815, 332) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 138

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

LCM(1, 138) = 138

GCD(1, 138) = ( 1 x 138 ) / 138

GCD(1, 138) = 138 / 138

GCD(1, 138) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 643

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

LCM(1, 643) = 643

GCD(1, 643) = ( 1 x 643 ) / 643

GCD(1, 643) = 643 / 643

GCD(1, 643) = 1

GCD of 815, 332, 138, 643 is 1

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1. What is the GCD of 815, 332, 138, 643?

GCD of 815, 332, 138, 643 is 1

2. Where do I get the detailed procedure to find GCD of 815, 332, 138, 643?

You can find a detailed procedure to find GCD of 815, 332, 138, 643 on our page.

3. How to find GCD of 815, 332, 138, 643 on a calculator?

You can find the GCD of 815, 332, 138, 643 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.