LCM of 640, 476, 645, 317
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 640, 476, 645, 317 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 640, 476, 645, 317. So, keep reading to learn more.
Given numbers are 640,476,645,317
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 640,476,645,317 is 3114410880.
Find LCM of 640,476,645,317 with Prime Factorization
| 2 | 640, 476, 645, 317 |
| 2 | 320, 238, 645, 317 |
| 5 | 160, 119, 645, 317 |
| 32, 119, 129, 317 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 5 x 32 x 119 x 129 x 317 = 3114410880
Therefore, the lowest common multiple of 640,476,645,317 is 3114410880.
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.
640 x 476 x 645 x 317 = 62288217600
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.
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
476 : 1, 2, 4, 7, 14, 17, 28, 34, 68, 119, 238, 476
645 : 1, 3, 5, 15, 43, 129, 215, 645
317 : 1, 317
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 640,476,645,317, is 1.
Now, the common factors can be found like this.
640:2x 2x 2x 2x 2x 2x 2x 5
476:2x 2x 7x 17
645:3x 5x 43
317:317
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 2x 5 = 20
Therefore, the value for common factors is 20.
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 = 62288217600/(1x20)
LCM = 62288217600/20
LCM = 3114410880
Thus, we can understand that the LCM of 640,476,645,317 is 3114410880.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 640, 476, 645, 317
1. What is the LCM of 640, 476, 645, 317?
Answer: LCM of 640, 476, 645, 317 is 3114410880.
2. How to calculate the LCM of 640, 476, 645, 317?
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 640, 476, 645, 317.
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}.