GCD of 535, 455, 28, 645 Calculator

Given Input numbers are 535, 455, 28, 645

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

Divisors of 535

List of positive integer divisors of 535 that divides 535 without a remainder.

1, 5, 107, 535

Divisors of 455

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

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

Divisors of 28

List of positive integer divisors of 28 that divides 28 without a remainder.

1, 2, 4, 7, 14, 28

Divisors of 645

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

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

Greatest Common Divisior

We found the divisors of 535, 455, 28, 645 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 535, 455, 28, 645 is 1.

Therefore, GCD of numbers 535, 455, 28, 645 is 1

Given Input Data is 535, 455, 28, 645

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

Prime Factorization of 535 is 5 x 107

Prime Factorization of 455 is 5 x 7 x 13

Prime Factorization of 28 is 2 x 2 x 7

Prime Factorization of 645 is 3 x 5 x 43

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(535, 455) = 48685

GCD(535, 455) = ( 535 x 455 ) / 48685

GCD(535, 455) = 243425 / 48685

GCD(535, 455) = 5

Step2:

Here we consider the GCD from the above i.e. 5 as first number and the next as 28

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

LCM(5, 28) = 140

GCD(5, 28) = ( 5 x 28 ) / 140

GCD(5, 28) = 140 / 140

GCD(5, 28) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 645

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

LCM(1, 645) = 645

GCD(1, 645) = ( 1 x 645 ) / 645

GCD(1, 645) = 645 / 645

GCD(1, 645) = 1

GCD of 535, 455, 28, 645 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 107, 573, 52, 202
• GCD of 966, 758, 22, 998
• GCD of 339, 574, 62, 207
• GCD of 270, 239, 40, 673
• GCD of 454, 153, 21, 492

1. What is the GCD of 535, 455, 28, 645?

GCD of 535, 455, 28, 645 is 1

2. Where do I get the detailed procedure to find GCD of 535, 455, 28, 645?

You can find a detailed procedure to find GCD of 535, 455, 28, 645 on our page.

3. How to find GCD of 535, 455, 28, 645 on a calculator?

You can find the GCD of 535, 455, 28, 645 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.