GCD of 245, 639, 422, 210 Calculator

Given Input numbers are 245, 639, 422, 210

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

Divisors of 245

List of positive integer divisors of 245 that divides 245 without a remainder.

1, 5, 7, 35, 49, 245

Divisors of 639

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

1, 3, 9, 71, 213, 639

Divisors of 422

List of positive integer divisors of 422 that divides 422 without a remainder.

1, 2, 211, 422

Divisors of 210

List of positive integer divisors of 210 that divides 210 without a remainder.

1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210

Greatest Common Divisior

We found the divisors of 245, 639, 422, 210 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 245, 639, 422, 210 is 1.

Therefore, GCD of numbers 245, 639, 422, 210 is 1

Given Input Data is 245, 639, 422, 210

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

Prime Factorization of 245 is 5 x 7 x 7

Prime Factorization of 639 is 3 x 3 x 71

Prime Factorization of 422 is 2 x 211

Prime Factorization of 210 is 2 x 3 x 5 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(245, 639) = 156555

GCD(245, 639) = ( 245 x 639 ) / 156555

GCD(245, 639) = 156555 / 156555

GCD(245, 639) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 422

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

LCM(1, 422) = 422

GCD(1, 422) = ( 1 x 422 ) / 422

GCD(1, 422) = 422 / 422

GCD(1, 422) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 210

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

LCM(1, 210) = 210

GCD(1, 210) = ( 1 x 210 ) / 210

GCD(1, 210) = 210 / 210

GCD(1, 210) = 1

GCD of 245, 639, 422, 210 is 1

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1. What is the GCD of 245, 639, 422, 210?

GCD of 245, 639, 422, 210 is 1

2. Where do I get the detailed procedure to find GCD of 245, 639, 422, 210?

You can find a detailed procedure to find GCD of 245, 639, 422, 210 on our page.

3. How to find GCD of 245, 639, 422, 210 on a calculator?

You can find the GCD of 245, 639, 422, 210 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.