GCD of 661, 309, 728, 261 Calculator

Given Input numbers are 661, 309, 728, 261

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 309 :

The positive integer divisors of 309 that completely divides 309 are.

1, 3, 103, 309

Divisors of 728 :

The positive integer divisors of 728 that completely divides 728 are.

1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 104, 182, 364, 728

Divisors of 261 :

The positive integer divisors of 261 that completely divides 261 are.

1, 3, 9, 29, 87, 261

GCD of numbers is the greatest common divisor

So, the GCD (661, 309, 728, 261) = 1.

Given numbers are 661, 309, 728, 261

The list of prime factors of all numbers are

Prime factors of 661 are 661

Prime factors of 309 are 3 x 103

Prime factors of 728 are 2 x 2 x 2 x 7 x 13

Prime factors of 261 are 3 x 3 x 29

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

Given numbers are 661, 309, 728, 261

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

Apply this formula for all numbers.

Step1:

LCM(661, 309) = 204249

GCD(661, 309) = ( 661 x 309 ) / 204249

= 661 / 309

= 661

Step2:

LCM(1, 728) = 728

GCD(1, 728) = ( 1 x 728 ) / 728

= 1 / 728

= 1

Step3:

LCM(1, 261) = 261

GCD(1, 261) = ( 1 x 261 ) / 261

= 1 / 261

= 1

So, Greatest Common Divisor of 661, 309, 728, 261 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 990, 150, 107, 747
• GCD of 914, 400, 900, 225
• GCD of 553, 502, 875, 329
• GCD of 686, 591, 821, 633
• GCD of 806, 479, 876, 453

Given numbers are 661, 309, 728, 261
The greatest common divisor of numbers 661, 309, 728, 261 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 661, 309, 728, 261 is 1.

1. What is the GCD of 661, 309, 728, 261?

GCD of given numbers 661, 309, 728, 261 is 1

2. How to calculate the greatest common divisor of 661, 309, 728, 261?

We can find the highest common divisor of 661, 309, 728, 261 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, 309, 728, 261 i.e 1.

3. How can I use the GCD of 661, 309, 728, 261Calculator?

Out the numbers 661, 309, 728, 261 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.