GCD of 855, 685, 18, 691 Calculator

Given Input numbers are 855, 685, 18, 691

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

Divisors of 855 :

The positive integer divisors of 855 that completely divides 855 are.

1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285, 855

Divisors of 685 :

The positive integer divisors of 685 that completely divides 685 are.

1, 5, 137, 685

Divisors of 18 :

The positive integer divisors of 18 that completely divides 18 are.

1, 2, 3, 6, 9, 18

Divisors of 691 :

The positive integer divisors of 691 that completely divides 691 are.

1, 691

GCD of numbers is the greatest common divisor

So, the GCD (855, 685, 18, 691) = 1.

Given numbers are 855, 685, 18, 691

The list of prime factors of all numbers are

Prime factors of 855 are 3 x 3 x 5 x 19

Prime factors of 685 are 5 x 137

Prime factors of 18 are 2 x 3 x 3

Prime factors of 691 are 691

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

Given numbers are 855, 685, 18, 691

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

Apply this formula for all numbers.

Step1:

LCM(855, 685) = 117135

GCD(855, 685) = ( 855 x 685 ) / 117135

= 855 / 685

= 855

Step2:

LCM(5, 18) = 90

GCD(5, 18) = ( 5 x 18 ) / 90

= 5 / 18

= 5

Step3:

LCM(1, 691) = 691

GCD(1, 691) = ( 1 x 691 ) / 691

= 1 / 691

= 1

So, Greatest Common Divisor of 855, 685, 18, 691 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 283, 554, 71, 338
• GCD of 145, 702, 33, 494
• GCD of 952, 324, 79, 403
• GCD of 478, 262, 53, 500
• GCD of 407, 854, 86, 617

Given numbers are 855, 685, 18, 691
The greatest common divisor of numbers 855, 685, 18, 691 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 855, 685, 18, 691 is 1.

1. What is the GCD of 855, 685, 18, 691?

GCD of given numbers 855, 685, 18, 691 is 1

2. How to calculate the greatest common divisor of 855, 685, 18, 691?

We can find the highest common divisor of 855, 685, 18, 691 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 855, 685, 18, 691 i.e 1.

3. How can I use the GCD of 855, 685, 18, 691Calculator?

Out the numbers 855, 685, 18, 691 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.