GCD of 642, 625, 65, 491 Calculator

Given Input numbers are 642, 625, 65, 491

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

Divisors of 642

List of positive integer divisors of 642 that divides 642 without a remainder.

1, 2, 3, 6, 107, 214, 321, 642

Divisors of 625

List of positive integer divisors of 625 that divides 625 without a remainder.

1, 5, 25, 125, 625

Divisors of 65

List of positive integer divisors of 65 that divides 65 without a remainder.

1, 5, 13, 65

Divisors of 491

List of positive integer divisors of 491 that divides 491 without a remainder.

1, 491

Greatest Common Divisior

We found the divisors of 642, 625, 65, 491 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 642, 625, 65, 491 is 1.

Therefore, GCD of numbers 642, 625, 65, 491 is 1

Given Input Data is 642, 625, 65, 491

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

Prime Factorization of 642 is 2 x 3 x 107

Prime Factorization of 625 is 5 x 5 x 5 x 5

Prime Factorization of 65 is 5 x 13

Prime Factorization of 491 is 491

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(642, 625) = 401250

GCD(642, 625) = ( 642 x 625 ) / 401250

GCD(642, 625) = 401250 / 401250

GCD(642, 625) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 65

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

LCM(1, 65) = 65

GCD(1, 65) = ( 1 x 65 ) / 65

GCD(1, 65) = 65 / 65

GCD(1, 65) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 491

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

LCM(1, 491) = 491

GCD(1, 491) = ( 1 x 491 ) / 491

GCD(1, 491) = 491 / 491

GCD(1, 491) = 1

GCD of 642, 625, 65, 491 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 342, 212, 98, 849
• GCD of 145, 935, 24, 959
• GCD of 958, 220, 13, 654
• GCD of 332, 733, 25, 783
• GCD of 387, 290, 95, 328

1. What is the GCD of 642, 625, 65, 491?

GCD of 642, 625, 65, 491 is 1

2. Where do I get the detailed procedure to find GCD of 642, 625, 65, 491?

You can find a detailed procedure to find GCD of 642, 625, 65, 491 on our page.

3. How to find GCD of 642, 625, 65, 491 on a calculator?

You can find the GCD of 642, 625, 65, 491 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.