GCD of 355, 621, 87, 438 Calculator

Given Input numbers are 355, 621, 87, 438

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

Divisors of 355

List of positive integer divisors of 355 that divides 355 without a remainder.

1, 5, 71, 355

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 87

List of positive integer divisors of 87 that divides 87 without a remainder.

1, 3, 29, 87

Divisors of 438

List of positive integer divisors of 438 that divides 438 without a remainder.

1, 2, 3, 6, 73, 146, 219, 438

Greatest Common Divisior

We found the divisors of 355, 621, 87, 438 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 355, 621, 87, 438 is 1.

Therefore, GCD of numbers 355, 621, 87, 438 is 1

Given Input Data is 355, 621, 87, 438

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

Prime Factorization of 355 is 5 x 71

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

Prime Factorization of 87 is 3 x 29

Prime Factorization of 438 is 2 x 3 x 73

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(355, 621) = 220455

GCD(355, 621) = ( 355 x 621 ) / 220455

GCD(355, 621) = 220455 / 220455

GCD(355, 621) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 87

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

LCM(1, 87) = 87

GCD(1, 87) = ( 1 x 87 ) / 87

GCD(1, 87) = 87 / 87

GCD(1, 87) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 438

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

LCM(1, 438) = 438

GCD(1, 438) = ( 1 x 438 ) / 438

GCD(1, 438) = 438 / 438

GCD(1, 438) = 1

GCD of 355, 621, 87, 438 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 995, 296, 69, 134
• GCD of 366, 775, 86, 288
• GCD of 267, 360, 62, 420
• GCD of 312, 328, 51, 913
• GCD of 403, 496, 53, 218

1. What is the GCD of 355, 621, 87, 438?

GCD of 355, 621, 87, 438 is 1

2. Where do I get the detailed procedure to find GCD of 355, 621, 87, 438?

You can find a detailed procedure to find GCD of 355, 621, 87, 438 on our page.

3. How to find GCD of 355, 621, 87, 438 on a calculator?

You can find the GCD of 355, 621, 87, 438 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.