GCD of 445, 402, 990, 638 Calculator

Given Input numbers are 445, 402, 990, 638

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

Divisors of 445 :

The positive integer divisors of 445 that completely divides 445 are.

1, 5, 89, 445

Divisors of 402 :

The positive integer divisors of 402 that completely divides 402 are.

1, 2, 3, 6, 67, 134, 201, 402

Divisors of 990 :

The positive integer divisors of 990 that completely divides 990 are.

1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990

Divisors of 638 :

The positive integer divisors of 638 that completely divides 638 are.

1, 2, 11, 22, 29, 58, 319, 638

GCD of numbers is the greatest common divisor

So, the GCD (445, 402, 990, 638) = 1.

Given numbers are 445, 402, 990, 638

The list of prime factors of all numbers are

Prime factors of 445 are 5 x 89

Prime factors of 402 are 2 x 3 x 67

Prime factors of 990 are 2 x 3 x 3 x 5 x 11

Prime factors of 638 are 2 x 11 x 29

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

Given numbers are 445, 402, 990, 638

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

Apply this formula for all numbers.

Step1:

LCM(445, 402) = 178890

GCD(445, 402) = ( 445 x 402 ) / 178890

= 445 / 402

= 445

Step2:

LCM(1, 990) = 990

GCD(1, 990) = ( 1 x 990 ) / 990

= 1 / 990

= 1

Step3:

LCM(1, 638) = 638

GCD(1, 638) = ( 1 x 638 ) / 638

= 1 / 638

= 1

So, Greatest Common Divisor of 445, 402, 990, 638 is 1

Here are some samples of GCD of Numbers calculations.

• GCD of 921, 785, 305, 688
• GCD of 486, 773, 551, 997
• GCD of 963, 899, 895, 194
• GCD of 786, 637, 204, 385
• GCD of 392, 388, 564, 429

Given numbers are 445, 402, 990, 638
The greatest common divisor of numbers 445, 402, 990, 638 can be found in various methods such as the LCM formula, factoring, and prime factorization. The GCD of numbers 445, 402, 990, 638 is 1.

1. What is the GCD of 445, 402, 990, 638?

GCD of given numbers 445, 402, 990, 638 is 1

2. How to calculate the greatest common divisor of 445, 402, 990, 638?

We can find the highest common divisor of 445, 402, 990, 638 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 445, 402, 990, 638 i.e 1.

3. How can I use the GCD of 445, 402, 990, 638Calculator?

Out the numbers 445, 402, 990, 638 into the GCD calculator and hit the calculate button to get the greatest common divisor as result.