GCD of 245, 689, 438, 691 Calculator

Given Input numbers are 245, 689, 438, 691

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

Divisors of 245 :

The positive integer divisors of 245 that completely divides 245 are.

1, 5, 7, 35, 49, 245

Divisors of 689 :

The positive integer divisors of 689 that completely divides 689 are.

1, 13, 53, 689

Divisors of 438 :

The positive integer divisors of 438 that completely divides 438 are.

1, 2, 3, 6, 73, 146, 219, 438

Divisors of 691 :

The positive integer divisors of 691 that completely divides 691 are.

1, 691

GCD of numbers is the greatest common divisor

So, the GCD (245, 689, 438, 691) = 1.

Given numbers are 245, 689, 438, 691

The list of prime factors of all numbers are

Prime factors of 245 are 5 x 7 x 7

Prime factors of 689 are 13 x 53

Prime factors of 438 are 2 x 3 x 73

Prime factors of 691 are 691

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

Given numbers are 245, 689, 438, 691

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

Apply this formula for all numbers.

Step1:

LCM(245, 689) = 168805

GCD(245, 689) = ( 245 x 689 ) / 168805

= 245 / 689

= 245

Step2:

LCM(1, 438) = 438

GCD(1, 438) = ( 1 x 438 ) / 438

= 1 / 438

= 1

Step3:

LCM(1, 691) = 691

GCD(1, 691) = ( 1 x 691 ) / 691

= 1 / 691

= 1

So, Greatest Common Divisor of 245, 689, 438, 691 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 377, 269, 668, 837
• GCD of 656, 480, 664, 535
• GCD of 231, 203, 266, 966
• GCD of 753, 858, 568, 219
• GCD of 475, 103, 912, 288

Given numbers are 245, 689, 438, 691
The greatest common divisor of numbers 245, 689, 438, 691 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 245, 689, 438, 691 is 1.

1. What is the GCD of 245, 689, 438, 691?

GCD of given numbers 245, 689, 438, 691 is 1

2. How to calculate the greatest common divisor of 245, 689, 438, 691?

We can find the highest common divisor of 245, 689, 438, 691 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 245, 689, 438, 691 i.e 1.

3. How can I use the GCD of 245, 689, 438, 691Calculator?

Out the numbers 245, 689, 438, 691 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.