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LCM of 691, 455, 640, 605

Created By : Jatin Gogia
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023


Find the LCM of 691, 455, 640, 605 with the LCM of Two or More Numbers Calculator. Here we are teaching you two different methods through which you can calculate the LCM of 691, 455, 640, 605. So, keep reading to learn more.

 

LCM of:

Calculate the LCM of 691,455,640,605

Given numbers are 691,455,640,605

The least common multiple of numbers can be find using the prime factorization method or LCM formula.

The LCM of 691,455,640,605 is 4869504640.

Find LCM of 691,455,640,605 with Prime Factorization


5 691, 455, 640, 605
691, 91, 128, 121

Multiply the prime numbers at the bottom and the left side.

5 x 691 x 91 x 128 x 121 = 4869504640

Therefore, the lowest common multiple of 691,455,640,605 is 4869504640.

LCM Formula to Find Lowest Common Multiple of 691,455,640,605

LCM formula is LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}

Firstly, we have to find the product of all the numbers.

691 x 455 x 640 x 605 = 121737616000

Then, let us find the GCF of these five numbers. To do so, we have to list down the factors for each number and choose the highest factor that is in all of the lists.

691 : 1, 691

455 : 1, 5, 7, 13, 35, 65, 91, 455

640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640

605 : 1, 5, 11, 55, 121, 605

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 691,455,640,605, is 1.

Now, the common factors can be found like this.

691:691

455:5x 7x 13

640:2x 2x 2x 2x 2x 2x 2x 5

605:5x 11x 11

From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.

5x 5 = 25

Therefore, the value for common factors is 25.

Now that we have all the elements of the formula, we can plug them in to calculate the LCM.

LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}

LCM = 121737616000/(1x25)

LCM = 121737616000/25

LCM = 4869504640

Thus, we can understand that the LCM of 691,455,640,605 is 4869504640.

LCM of two or more Numbers Calculation Examples

FAQs on LCM of 691, 455, 640, 605

1. What is the LCM of 691, 455, 640, 605?

Answer: LCM of 691, 455, 640, 605 is 4869504640.

2. How to calculate the LCM of 691, 455, 640, 605?

The LCM can be found using two methods. You can either use the LCM formula or the prime factorization method to calculate the LCM of 691, 455, 640, 605.

3. What is the LCM formula?

The LCM formula is LCM(a1, a2, an) = (a1 x a2 x an)/{GCF(a1 x a2 x an) x common factors}.