GCD of 638, 729, 905, 689 Calculator

Given Input numbers are 638, 729, 905, 689

In the factoring method, we have to find the divisors of all numbers

Divisors of 638 :

The positive integer divisors of 638 that completely divides 638 are.

1, 2, 11, 22, 29, 58, 319, 638

Divisors of 729 :

The positive integer divisors of 729 that completely divides 729 are.

1, 3, 9, 27, 81, 243, 729

Divisors of 905 :

The positive integer divisors of 905 that completely divides 905 are.

1, 5, 181, 905

Divisors of 689 :

The positive integer divisors of 689 that completely divides 689 are.

1, 13, 53, 689

GCD of numbers is the greatest common divisor

So, the GCD (638, 729, 905, 689) = 1.

Given numbers are 638, 729, 905, 689

The list of prime factors of all numbers are

Prime factors of 638 are 2 x 11 x 29

Prime factors of 729 are 3 x 3 x 3 x 3 x 3 x 3

Prime factors of 905 are 5 x 181

Prime factors of 689 are 13 x 53

The above numbers do not have any common prime factor. So GCD is 1

Given numbers are 638, 729, 905, 689

GCD of 2 numbers formula is GCD(a, b) = ( a x b) / LCM(a, b)

Apply this formula for all numbers.

Step1:

LCM(638, 729) = 465102

GCD(638, 729) = ( 638 x 729 ) / 465102

= 638 / 729

= 638

Step2:

LCM(1, 905) = 905

GCD(1, 905) = ( 1 x 905 ) / 905

= 1 / 905

= 1

Step3:

LCM(1, 689) = 689

GCD(1, 689) = ( 1 x 689 ) / 689

= 1 / 689

= 1

So, Greatest Common Divisor of 638, 729, 905, 689 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 147, 646, 835, 122
• GCD of 566, 428, 967, 318
• GCD of 601, 468, 232, 100
• GCD of 331, 887, 651, 626
• GCD of 699, 871, 919, 127

Given numbers are 638, 729, 905, 689
The greatest common divisor of numbers 638, 729, 905, 689 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 638, 729, 905, 689 is 1.

1. What is the GCD of 638, 729, 905, 689?

GCD of given numbers 638, 729, 905, 689 is 1

2. How to calculate the greatest common divisor of 638, 729, 905, 689?

We can find the highest common divisor of 638, 729, 905, 689 easily using the prime factorization method. Just list the prime factors of all numbers and pick the highest common factor which is the GCD of 638, 729, 905, 689 i.e 1.

3. How can I use the GCD of 638, 729, 905, 689Calculator?

Out the numbers 638, 729, 905, 689 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.