GCD of 321, 780, 390, 860 Calculator

Given Input numbers are 321, 780, 390, 860

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

Divisors of 321 :

The positive integer divisors of 321 that completely divides 321 are.

1, 3, 107, 321

Divisors of 780 :

The positive integer divisors of 780 that completely divides 780 are.

1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780

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 860 :

The positive integer divisors of 860 that completely divides 860 are.

1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860

GCD of numbers is the greatest common divisor

So, the GCD (321, 780, 390, 860) = 1.

Given numbers are 321, 780, 390, 860

The list of prime factors of all numbers are

Prime factors of 321 are 3 x 107

Prime factors of 780 are 2 x 2 x 3 x 5 x 13

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

Prime factors of 860 are 2 x 2 x 5 x 43

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

Given numbers are 321, 780, 390, 860

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

Apply this formula for all numbers.

Step1:

LCM(321, 780) = 83460

GCD(321, 780) = ( 321 x 780 ) / 83460

= 321 / 780

= 321

Step2:

LCM(3, 390) = 390

GCD(3, 390) = ( 3 x 390 ) / 390

= 3 / 390

= 3

Step3:

LCM(3, 860) = 2580

GCD(3, 860) = ( 3 x 860 ) / 2580

= 3 / 860

= 3

So, Greatest Common Divisor of 321, 780, 390, 860 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 663, 593, 254, 510
• GCD of 903, 679, 108, 308
• GCD of 987, 942, 660, 477
• GCD of 942, 247, 132, 277
• GCD of 825, 792, 791, 963

Given numbers are 321, 780, 390, 860
The greatest common divisor of numbers 321, 780, 390, 860 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 321, 780, 390, 860 is 1.

1. What is the GCD of 321, 780, 390, 860?

GCD of given numbers 321, 780, 390, 860 is 1

2. How to calculate the greatest common divisor of 321, 780, 390, 860?

We can find the highest common divisor of 321, 780, 390, 860 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 321, 780, 390, 860 i.e 1.

3. How can I use the GCD of 321, 780, 390, 860Calculator?

Out the numbers 321, 780, 390, 860 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.