GCD of 639, 721, 77, 125 Calculator

Given Input numbers are 639, 721, 77, 125

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

Divisors of 639

List of positive integer divisors of 639 that divides 639 without a remainder.

1, 3, 9, 71, 213, 639

Divisors of 721

List of positive integer divisors of 721 that divides 721 without a remainder.

1, 7, 103, 721

Divisors of 77

List of positive integer divisors of 77 that divides 77 without a remainder.

1, 7, 11, 77

Divisors of 125

List of positive integer divisors of 125 that divides 125 without a remainder.

1, 5, 25, 125

Greatest Common Divisior

We found the divisors of 639, 721, 77, 125 . The biggest common divisior number is the GCD number.
So the Greatest Common Divisior 639, 721, 77, 125 is 1.

Therefore, GCD of numbers 639, 721, 77, 125 is 1

Given Input Data is 639, 721, 77, 125

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

Prime Factorization of 639 is 3 x 3 x 71

Prime Factorization of 721 is 7 x 103

Prime Factorization of 77 is 7 x 11

Prime Factorization of 125 is 5 x 5 x 5

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(639, 721) = 460719

GCD(639, 721) = ( 639 x 721 ) / 460719

GCD(639, 721) = 460719 / 460719

GCD(639, 721) = 1

Step2:

Here we consider the GCD from the above i.e. 1 as first number and the next as 77

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

LCM(1, 77) = 77

GCD(1, 77) = ( 1 x 77 ) / 77

GCD(1, 77) = 77 / 77

GCD(1, 77) = 1

Step3:

Here we consider the GCD from the above i.e. 1 as first number and the next as 125

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

LCM(1, 125) = 125

GCD(1, 125) = ( 1 x 125 ) / 125

GCD(1, 125) = 125 / 125

GCD(1, 125) = 1

GCD of 639, 721, 77, 125 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 127, 205, 26, 877
• GCD of 609, 479, 71, 574
• GCD of 825, 468, 15, 403
• GCD of 839, 140, 33, 524
• GCD of 694, 296, 23, 246

1. What is the GCD of 639, 721, 77, 125?

GCD of 639, 721, 77, 125 is 1

2. Where do I get the detailed procedure to find GCD of 639, 721, 77, 125?

You can find a detailed procedure to find GCD of 639, 721, 77, 125 on our page.

3. How to find GCD of 639, 721, 77, 125 on a calculator?

You can find the GCD of 639, 721, 77, 125 by simply giving the inputs separated by commas and click on the calculate button to avail the Greatest Common Divisor in less time.