LCM of 631, 395, 810, 640
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 631, 395, 810, 640 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 631, 395, 810, 640. So, keep reading to learn more.
Given numbers are 631,395,810,640
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 631,395,810,640 is 2584172160.
Find LCM of 631,395,810,640 with Prime Factorization
| 2 | 631, 395, 810, 640 |
| 5 | 631, 395, 405, 320 |
| 631, 79, 81, 64 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 631 x 79 x 81 x 64 = 2584172160
Therefore, the lowest common multiple of 631,395,810,640 is 2584172160.
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.
631 x 395 x 810 x 640 = 129208608000
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.
631 : 1, 631
395 : 1, 5, 79, 395
810 : 1, 2, 3, 5, 6, 9, 10, 15, 18, 27, 30, 45, 54, 81, 90, 135, 162, 270, 405, 810
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 631,395,810,640, is 1.
Now, the common factors can be found like this.
631:631
395:5x 79
810:2x 3x 3x 3x 3x 5
640:2x 2x 2x 2x 2x 2x 2x 5
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 5x 5 = 50
Therefore, the value for common factors is 50.
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 = 129208608000/(1x50)
LCM = 129208608000/50
LCM = 2584172160
Thus, we can understand that the LCM of 631,395,810,640 is 2584172160.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 631, 395, 810, 640
1. What is the LCM of 631, 395, 810, 640?
Answer: LCM of 631, 395, 810, 640 is 2584172160.
2. How to calculate the LCM of 631, 395, 810, 640?
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 631, 395, 810, 640.
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}.