GCD of 620, 978, 455 Calculator

Given Input numbers are 620, 978, 455

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

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

Divisors of 978

List of positive integer divisors of 978 that divides 978 without a remainder.

1, 2, 3, 6, 163, 326, 489, 978

Divisors of 455

List of positive integer divisors of 455 that divides 455 without a remainder.

1, 5, 7, 13, 35, 65, 91, 455

Greatest Common Divisior

We found the divisors of 620, 978, 455 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 620, 978, 455 is 1.

Therefore, GCD of numbers 620, 978, 455 is 1

Given Input Data is 620, 978, 455

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

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

Prime Factorization of 978 is 2 x 3 x 163

Prime Factorization of 455 is 5 x 7 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(620, 978) = 303180

GCD(620, 978) = ( 620 x 978 ) / 303180

GCD(620, 978) = 606360 / 303180

GCD(620, 978) = 2

Step2:

Here we consider the GCD from the above i.e. 2 as first number and the next as 455

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

LCM(2, 455) = 910

GCD(2, 455) = ( 2 x 455 ) / 910

GCD(2, 455) = 910 / 910

GCD(2, 455) = 1

GCD of 620, 978, 455 is 1

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1. What is the GCD of 620, 978, 455?

GCD of 620, 978, 455 is 1

2. Where do I get the detailed procedure to find GCD of 620, 978, 455?

You can find a detailed procedure to find GCD of 620, 978, 455 on our page.

3. How to find GCD of 620, 978, 455 on a calculator?

You can find the GCD of 620, 978, 455 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.