GCD of 645, 273, 620 Calculator

Given Input numbers are 645, 273, 620

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

Divisors of 645

List of positive integer divisors of 645 that divides 645 without a remainder.

1, 3, 5, 15, 43, 129, 215, 645

Divisors of 273

List of positive integer divisors of 273 that divides 273 without a remainder.

1, 3, 7, 13, 21, 39, 91, 273

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 645, 273, 620 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 645, 273, 620 is 1.

Therefore, GCD of numbers 645, 273, 620 is 1

Given Input Data is 645, 273, 620

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

Prime Factorization of 645 is 3 x 5 x 43

Prime Factorization of 273 is 3 x 7 x 13

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(645, 273) = 58695

GCD(645, 273) = ( 645 x 273 ) / 58695

GCD(645, 273) = 176085 / 58695

GCD(645, 273) = 3

Step2:

Here we consider the GCD from the above i.e. 3 as first number and the next as 620

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

LCM(3, 620) = 1860

GCD(3, 620) = ( 3 x 620 ) / 1860

GCD(3, 620) = 1860 / 1860

GCD(3, 620) = 1

GCD of 645, 273, 620 is 1

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1. What is the GCD of 645, 273, 620?

GCD of 645, 273, 620 is 1

2. Where do I get the detailed procedure to find GCD of 645, 273, 620?

You can find a detailed procedure to find GCD of 645, 273, 620 on our page.

3. How to find GCD of 645, 273, 620 on a calculator?

You can find the GCD of 645, 273, 620 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.