GCD of 216, 639, 49, 390 Calculator

Given Input numbers are 216, 639, 49, 390

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

Divisors of 216

List of positive integer divisors of 216 that divides 216 without a remainder.

1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 27, 36, 54, 72, 108, 216

Divisors of 639

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

1, 3, 9, 71, 213, 639

Divisors of 49

List of positive integer divisors of 49 that divides 49 without a remainder.

1, 7, 49

Divisors of 390

List of positive integer divisors of 390 that divides 390 without a remainder.

1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390

Greatest Common Divisior

We found the divisors of 216, 639, 49, 390 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 216, 639, 49, 390 is 1.

Therefore, GCD of numbers 216, 639, 49, 390 is 1

Given Input Data is 216, 639, 49, 390

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

Prime Factorization of 216 is 2 x 2 x 2 x 3 x 3 x 3

Prime Factorization of 639 is 3 x 3 x 71

Prime Factorization of 49 is 7 x 7

Prime Factorization of 390 is 2 x 3 x 5 x 13

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(216, 639) = 15336

GCD(216, 639) = ( 216 x 639 ) / 15336

GCD(216, 639) = 138024 / 15336

GCD(216, 639) = 9

Step2:

Here we consider the GCD from the above i.e. 9 as first number and the next as 49

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

LCM(9, 49) = 441

GCD(9, 49) = ( 9 x 49 ) / 441

GCD(9, 49) = 441 / 441

GCD(9, 49) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 390

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

LCM(1, 390) = 390

GCD(1, 390) = ( 1 x 390 ) / 390

GCD(1, 390) = 390 / 390

GCD(1, 390) = 1

GCD of 216, 639, 49, 390 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 239, 981, 16, 174
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• GCD of 632, 111, 67, 500

1. What is the GCD of 216, 639, 49, 390?

GCD of 216, 639, 49, 390 is 1

2. Where do I get the detailed procedure to find GCD of 216, 639, 49, 390?

You can find a detailed procedure to find GCD of 216, 639, 49, 390 on our page.

3. How to find GCD of 216, 639, 49, 390 on a calculator?

You can find the GCD of 216, 639, 49, 390 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.