GCD of 646, 720, 280, 123 Calculator

Given Input numbers are 646, 720, 280, 123

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

Divisors of 646 :

The positive integer divisors of 646 that completely divides 646 are.

1, 2, 17, 19, 34, 38, 323, 646

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 280 :

The positive integer divisors of 280 that completely divides 280 are.

1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280

Divisors of 123 :

The positive integer divisors of 123 that completely divides 123 are.

1, 3, 41, 123

GCD of numbers is the greatest common divisor

So, the GCD (646, 720, 280, 123) = 1.

Given numbers are 646, 720, 280, 123

The list of prime factors of all numbers are

Prime factors of 646 are 2 x 17 x 19

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

Prime factors of 280 are 2 x 2 x 2 x 5 x 7

Prime factors of 123 are 3 x 41

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

Given numbers are 646, 720, 280, 123

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

Apply this formula for all numbers.

Step1:

LCM(646, 720) = 232560

GCD(646, 720) = ( 646 x 720 ) / 232560

= 646 / 720

= 646

Step2:

LCM(2, 280) = 280

GCD(2, 280) = ( 2 x 280 ) / 280

= 2 / 280

= 2

Step3:

LCM(2, 123) = 246

GCD(2, 123) = ( 2 x 123 ) / 246

= 2 / 123

= 2

So, Greatest Common Divisor of 646, 720, 280, 123 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 947, 381, 264, 336
• GCD of 645, 297, 237, 388
• GCD of 798, 477, 357, 672
• GCD of 551, 388, 327, 434
• GCD of 713, 576, 563, 767

Given numbers are 646, 720, 280, 123
The greatest common divisor of numbers 646, 720, 280, 123 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 646, 720, 280, 123 is 1.

1. What is the GCD of 646, 720, 280, 123?

GCD of given numbers 646, 720, 280, 123 is 1

2. How to calculate the greatest common divisor of 646, 720, 280, 123?

We can find the highest common divisor of 646, 720, 280, 123 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 646, 720, 280, 123 i.e 1.

3. How can I use the GCD of 646, 720, 280, 123Calculator?

Out the numbers 646, 720, 280, 123 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.