GCD of 864, 990, 891, 647 Calculator

Given Input numbers are 864, 990, 891, 647

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

Divisors of 864 :

The positive integer divisors of 864 that completely divides 864 are.

1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 27, 32, 36, 48, 54, 72, 96, 108, 144, 216, 288, 432, 864

Divisors of 990 :

The positive integer divisors of 990 that completely divides 990 are.

1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990

Divisors of 891 :

The positive integer divisors of 891 that completely divides 891 are.

1, 3, 9, 11, 27, 33, 81, 99, 297, 891

Divisors of 647 :

The positive integer divisors of 647 that completely divides 647 are.

1, 647

GCD of numbers is the greatest common divisor

So, the GCD (864, 990, 891, 647) = 1.

Given numbers are 864, 990, 891, 647

The list of prime factors of all numbers are

Prime factors of 864 are 2 x 2 x 2 x 2 x 2 x 3 x 3 x 3

Prime factors of 990 are 2 x 3 x 3 x 5 x 11

Prime factors of 891 are 3 x 3 x 3 x 3 x 11

Prime factors of 647 are 647

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

Given numbers are 864, 990, 891, 647

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

Apply this formula for all numbers.

Step1:

LCM(864, 990) = 47520

GCD(864, 990) = ( 864 x 990 ) / 47520

= 864 / 990

= 864

Step2:

LCM(18, 891) = 1782

GCD(18, 891) = ( 18 x 891 ) / 1782

= 18 / 891

= 18

Step3:

LCM(9, 647) = 5823

GCD(9, 647) = ( 9 x 647 ) / 5823

= 9 / 647

= 9

So, Greatest Common Divisor of 864, 990, 891, 647 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 665, 628, 769, 992
• GCD of 605, 818, 973, 998
• GCD of 850, 726, 728, 595
• GCD of 475, 753, 804, 464
• GCD of 923, 907, 584, 731

Given numbers are 864, 990, 891, 647
The greatest common divisor of numbers 864, 990, 891, 647 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 864, 990, 891, 647 is 1.

1. What is the GCD of 864, 990, 891, 647?

GCD of given numbers 864, 990, 891, 647 is 1

2. How to calculate the greatest common divisor of 864, 990, 891, 647?

We can find the highest common divisor of 864, 990, 891, 647 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 864, 990, 891, 647 i.e 1.

3. How can I use the GCD of 864, 990, 891, 647Calculator?

Out the numbers 864, 990, 891, 647 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.