GCD of 21, 671, 573, 620 Calculator

Given Input numbers are 21, 671, 573, 620

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

Divisors of 21

List of positive integer divisors of 21 that divides 21 without a remainder.

1, 3, 7, 21

Divisors of 671

List of positive integer divisors of 671 that divides 671 without a remainder.

1, 11, 61, 671

Divisors of 573

List of positive integer divisors of 573 that divides 573 without a remainder.

1, 3, 191, 573

Divisors of 620

List of positive integer divisors of 620 that divides 620 without a remainder.

1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620

Greatest Common Divisior

We found the divisors of 21, 671, 573, 620 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 21, 671, 573, 620 is 1.

Therefore, GCD of numbers 21, 671, 573, 620 is 1

Given Input Data is 21, 671, 573, 620

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

Prime Factorization of 21 is 3 x 7

Prime Factorization of 671 is 11 x 61

Prime Factorization of 573 is 3 x 191

Prime Factorization of 620 is 2 x 2 x 5 x 31

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(21, 671) = 14091

GCD(21, 671) = ( 21 x 671 ) / 14091

GCD(21, 671) = 14091 / 14091

GCD(21, 671) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 573

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

LCM(1, 573) = 573

GCD(1, 573) = ( 1 x 573 ) / 573

GCD(1, 573) = 573 / 573

GCD(1, 573) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 620

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

LCM(1, 620) = 620

GCD(1, 620) = ( 1 x 620 ) / 620

GCD(1, 620) = 620 / 620

GCD(1, 620) = 1

GCD of 21, 671, 573, 620 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 87, 884, 656, 590
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• GCD of 60, 315, 505, 109

1. What is the GCD of 21, 671, 573, 620?

GCD of 21, 671, 573, 620 is 1

2. Where do I get the detailed procedure to find GCD of 21, 671, 573, 620?

You can find a detailed procedure to find GCD of 21, 671, 573, 620 on our page.

3. How to find GCD of 21, 671, 573, 620 on a calculator?

You can find the GCD of 21, 671, 573, 620 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.