GCD of 385, 690, 665, 661 Calculator

Given Input numbers are 385, 690, 665, 661

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

Divisors of 385 :

The positive integer divisors of 385 that completely divides 385 are.

1, 5, 7, 11, 35, 55, 77, 385

Divisors of 690 :

The positive integer divisors of 690 that completely divides 690 are.

1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690

Divisors of 665 :

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

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

Divisors of 661 :

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

1, 661

GCD of numbers is the greatest common divisor

So, the GCD (385, 690, 665, 661) = 1.

Given numbers are 385, 690, 665, 661

The list of prime factors of all numbers are

Prime factors of 385 are 5 x 7 x 11

Prime factors of 690 are 2 x 3 x 5 x 23

Prime factors of 665 are 5 x 7 x 19

Prime factors of 661 are 661

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

Given numbers are 385, 690, 665, 661

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

Apply this formula for all numbers.

Step1:

LCM(385, 690) = 53130

GCD(385, 690) = ( 385 x 690 ) / 53130

= 385 / 690

= 385

Step2:

LCM(5, 665) = 665

GCD(5, 665) = ( 5 x 665 ) / 665

= 5 / 665

= 5

Step3:

LCM(5, 661) = 3305

GCD(5, 661) = ( 5 x 661 ) / 3305

= 5 / 661

= 5

So, Greatest Common Divisor of 385, 690, 665, 661 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 266, 849, 556, 272
• GCD of 316, 323, 809, 979
• GCD of 572, 357, 219, 418
• GCD of 490, 320, 906, 980
• GCD of 157, 823, 216, 420

Given numbers are 385, 690, 665, 661
The greatest common divisor of numbers 385, 690, 665, 661 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 385, 690, 665, 661 is 1.

1. What is the GCD of 385, 690, 665, 661?

GCD of given numbers 385, 690, 665, 661 is 1

2. How to calculate the greatest common divisor of 385, 690, 665, 661?

We can find the highest common divisor of 385, 690, 665, 661 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 385, 690, 665, 661 i.e 1.

3. How can I use the GCD of 385, 690, 665, 661Calculator?

Out the numbers 385, 690, 665, 661 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.