GCD of 661, 408, 720, 813 Calculator

Given Input numbers are 661, 408, 720, 813

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

Divisors of 661 :

The positive integer divisors of 661 that completely divides 661 are.

1, 661

Divisors of 408 :

The positive integer divisors of 408 that completely divides 408 are.

1, 2, 3, 4, 6, 8, 12, 17, 24, 34, 51, 68, 102, 136, 204, 408

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 813 :

The positive integer divisors of 813 that completely divides 813 are.

1, 3, 271, 813

GCD of numbers is the greatest common divisor

So, the GCD (661, 408, 720, 813) = 1.

Given numbers are 661, 408, 720, 813

The list of prime factors of all numbers are

Prime factors of 661 are 661

Prime factors of 408 are 2 x 2 x 2 x 3 x 17

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

Prime factors of 813 are 3 x 271

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

Given numbers are 661, 408, 720, 813

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

Apply this formula for all numbers.

Step1:

LCM(661, 408) = 269688

GCD(661, 408) = ( 661 x 408 ) / 269688

= 661 / 408

= 661

Step2:

LCM(1, 720) = 720

GCD(1, 720) = ( 1 x 720 ) / 720

= 1 / 720

= 1

Step3:

LCM(1, 813) = 813

GCD(1, 813) = ( 1 x 813 ) / 813

= 1 / 813

= 1

So, Greatest Common Divisor of 661, 408, 720, 813 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 723, 513, 973, 561
• GCD of 311, 489, 894, 113
• GCD of 877, 305, 272, 190
• GCD of 569, 598, 761, 634
• GCD of 781, 935, 737, 853

Given numbers are 661, 408, 720, 813
The greatest common divisor of numbers 661, 408, 720, 813 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 661, 408, 720, 813 is 1.

1. What is the GCD of 661, 408, 720, 813?

GCD of given numbers 661, 408, 720, 813 is 1

2. How to calculate the greatest common divisor of 661, 408, 720, 813?

We can find the highest common divisor of 661, 408, 720, 813 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 661, 408, 720, 813 i.e 1.

3. How can I use the GCD of 661, 408, 720, 813Calculator?

Out the numbers 661, 408, 720, 813 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.