GCD of 621, 391, 68, 220 Calculator

Given Input numbers are 621, 391, 68, 220

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

Divisors of 621

List of positive integer divisors of 621 that divides 621 without a remainder.

1, 3, 9, 23, 27, 69, 207, 621

Divisors of 391

List of positive integer divisors of 391 that divides 391 without a remainder.

1, 17, 23, 391

Divisors of 68

List of positive integer divisors of 68 that divides 68 without a remainder.

1, 2, 4, 17, 34, 68

Divisors of 220

List of positive integer divisors of 220 that divides 220 without a remainder.

1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220

Greatest Common Divisior

We found the divisors of 621, 391, 68, 220 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 621, 391, 68, 220 is 1.

Therefore, GCD of numbers 621, 391, 68, 220 is 1

Given Input Data is 621, 391, 68, 220

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

Prime Factorization of 621 is 3 x 3 x 3 x 23

Prime Factorization of 391 is 17 x 23

Prime Factorization of 68 is 2 x 2 x 17

Prime Factorization of 220 is 2 x 2 x 5 x 11

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(621, 391) = 10557

GCD(621, 391) = ( 621 x 391 ) / 10557

GCD(621, 391) = 242811 / 10557

GCD(621, 391) = 23

Step2:

Here we consider the GCD from the above i.e. 23 as first number and the next as 68

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

LCM(23, 68) = 1564

GCD(23, 68) = ( 23 x 68 ) / 1564

GCD(23, 68) = 1564 / 1564

GCD(23, 68) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 220

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

LCM(1, 220) = 220

GCD(1, 220) = ( 1 x 220 ) / 220

GCD(1, 220) = 220 / 220

GCD(1, 220) = 1

GCD of 621, 391, 68, 220 is 1

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• GCD of 972, 629, 36, 936
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1. What is the GCD of 621, 391, 68, 220?

GCD of 621, 391, 68, 220 is 1

2. Where do I get the detailed procedure to find GCD of 621, 391, 68, 220?

You can find a detailed procedure to find GCD of 621, 391, 68, 220 on our page.

3. How to find GCD of 621, 391, 68, 220 on a calculator?

You can find the GCD of 621, 391, 68, 220 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.