GCD of 639, 905, 385, 100 Calculator

Given Input numbers are 639, 905, 385, 100

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

Divisors of 639

List of positive integer divisors of 639 that divides 639 without a remainder.

1, 3, 9, 71, 213, 639

Divisors of 905

List of positive integer divisors of 905 that divides 905 without a remainder.

1, 5, 181, 905

Divisors of 385

List of positive integer divisors of 385 that divides 385 without a remainder.

1, 5, 7, 11, 35, 55, 77, 385

Divisors of 100

List of positive integer divisors of 100 that divides 100 without a remainder.

1, 2, 4, 5, 10, 20, 25, 50, 100

Greatest Common Divisior

We found the divisors of 639, 905, 385, 100 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 639, 905, 385, 100 is 1.

Therefore, GCD of numbers 639, 905, 385, 100 is 1

Given Input Data is 639, 905, 385, 100

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

Prime Factorization of 639 is 3 x 3 x 71

Prime Factorization of 905 is 5 x 181

Prime Factorization of 385 is 5 x 7 x 11

Prime Factorization of 100 is 2 x 2 x 5 x 5

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(639, 905) = 578295

GCD(639, 905) = ( 639 x 905 ) / 578295

GCD(639, 905) = 578295 / 578295

GCD(639, 905) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 385

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

LCM(1, 385) = 385

GCD(1, 385) = ( 1 x 385 ) / 385

GCD(1, 385) = 385 / 385

GCD(1, 385) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 100

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

LCM(1, 100) = 100

GCD(1, 100) = ( 1 x 100 ) / 100

GCD(1, 100) = 100 / 100

GCD(1, 100) = 1

GCD of 639, 905, 385, 100 is 1

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1. What is the GCD of 639, 905, 385, 100?

GCD of 639, 905, 385, 100 is 1

2. Where do I get the detailed procedure to find GCD of 639, 905, 385, 100?

You can find a detailed procedure to find GCD of 639, 905, 385, 100 on our page.

3. How to find GCD of 639, 905, 385, 100 on a calculator?

You can find the GCD of 639, 905, 385, 100 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.