GCD of 687, 390, 691, 425 Calculator

Given Input numbers are 687, 390, 691, 425

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

Divisors of 687 :

The positive integer divisors of 687 that completely divides 687 are.

1, 3, 229, 687

Divisors of 390 :

The positive integer divisors of 390 that completely divides 390 are.

1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390

Divisors of 691 :

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

1, 691

Divisors of 425 :

The positive integer divisors of 425 that completely divides 425 are.

1, 5, 17, 25, 85, 425

GCD of numbers is the greatest common divisor

So, the GCD (687, 390, 691, 425) = 1.

Given numbers are 687, 390, 691, 425

The list of prime factors of all numbers are

Prime factors of 687 are 3 x 229

Prime factors of 390 are 2 x 3 x 5 x 13

Prime factors of 691 are 691

Prime factors of 425 are 5 x 5 x 17

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

Given numbers are 687, 390, 691, 425

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

Apply this formula for all numbers.

Step1:

LCM(687, 390) = 89310

GCD(687, 390) = ( 687 x 390 ) / 89310

= 687 / 390

= 687

Step2:

LCM(3, 691) = 2073

GCD(3, 691) = ( 3 x 691 ) / 2073

= 3 / 691

= 3

Step3:

LCM(1, 425) = 425

GCD(1, 425) = ( 1 x 425 ) / 425

= 1 / 425

= 1

So, Greatest Common Divisor of 687, 390, 691, 425 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 581, 108, 193, 207
• GCD of 994, 858, 884, 244
• GCD of 533, 619, 585, 383
• GCD of 537, 330, 875, 768
• GCD of 849, 150, 242, 291

Given numbers are 687, 390, 691, 425
The greatest common divisor of numbers 687, 390, 691, 425 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 687, 390, 691, 425 is 1.

1. What is the GCD of 687, 390, 691, 425?

GCD of given numbers 687, 390, 691, 425 is 1

2. How to calculate the greatest common divisor of 687, 390, 691, 425?

We can find the highest common divisor of 687, 390, 691, 425 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 687, 390, 691, 425 i.e 1.

3. How can I use the GCD of 687, 390, 691, 425Calculator?

Out the numbers 687, 390, 691, 425 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.