GCD of 720, 777, 390, 665 Calculator

Given Input numbers are 720, 777, 390, 665

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

Divisors of 720 :

The positive integer divisors of 720 that completely divides 720 are.

1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 36, 40, 45, 48, 60, 72, 80, 90, 120, 144, 180, 240, 360, 720

Divisors of 777 :

The positive integer divisors of 777 that completely divides 777 are.

1, 3, 7, 21, 37, 111, 259, 777

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 665 :

The positive integer divisors of 665 that completely divides 665 are.

1, 5, 7, 19, 35, 95, 133, 665

GCD of numbers is the greatest common divisor

So, the GCD (720, 777, 390, 665) = 1.

Given numbers are 720, 777, 390, 665

The list of prime factors of all numbers are

Prime factors of 720 are 2 x 2 x 2 x 2 x 3 x 3 x 5

Prime factors of 777 are 3 x 7 x 37

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

Prime factors of 665 are 5 x 7 x 19

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

Given numbers are 720, 777, 390, 665

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

Apply this formula for all numbers.

Step1:

LCM(720, 777) = 186480

GCD(720, 777) = ( 720 x 777 ) / 186480

= 720 / 777

= 720

Step2:

LCM(3, 390) = 390

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

= 3 / 390

= 3

Step3:

LCM(3, 665) = 1995

GCD(3, 665) = ( 3 x 665 ) / 1995

= 3 / 665

= 3

So, Greatest Common Divisor of 720, 777, 390, 665 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 670, 257, 686, 128
• GCD of 986, 474, 849, 519
• GCD of 433, 726, 402, 759
• GCD of 835, 846, 226, 202
• GCD of 863, 727, 617, 541

Given numbers are 720, 777, 390, 665
The greatest common divisor of numbers 720, 777, 390, 665 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 720, 777, 390, 665 is 1.

1. What is the GCD of 720, 777, 390, 665?

GCD of given numbers 720, 777, 390, 665 is 1

2. How to calculate the greatest common divisor of 720, 777, 390, 665?

We can find the highest common divisor of 720, 777, 390, 665 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 720, 777, 390, 665 i.e 1.

3. How can I use the GCD of 720, 777, 390, 665Calculator?

Out the numbers 720, 777, 390, 665 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.