LCM of 638, 368, 640, 688
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 638, 368, 640, 688 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 638, 368, 640, 688. So, keep reading to learn more.
Given numbers are 638,368,640,688
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 638,368,640,688 is 201914240.
Find LCM of 638,368,640,688 with Prime Factorization
| 2 | 638, 368, 640, 688 |
| 2 | 319, 184, 320, 344 |
| 2 | 319, 92, 160, 172 |
| 2 | 319, 46, 80, 86 |
| 319, 23, 40, 43 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 2 x 319 x 23 x 40 x 43 = 201914240
Therefore, the lowest common multiple of 638,368,640,688 is 201914240.
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.
638 x 368 x 640 x 688 = 103380090880
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.
638 : 1, 2, 11, 22, 29, 58, 319, 638
368 : 1, 2, 4, 8, 16, 23, 46, 92, 184, 368
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
688 : 1, 2, 4, 8, 16, 43, 86, 172, 344, 688
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 638,368,640,688, is 2.
Now, the common factors can be found like this.
638:2x 11x 29
368:2x 2x 2x 2x 23
640:2x 2x 2x 2x 2x 2x 2x 5
688:2x 2x 2x 2x 43
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 2x 2x 2x 2x 2x 2 = 256
Therefore, the value for common factors is 256.
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 = 103380090880/(2x256)
LCM = 103380090880/512
LCM = 201914240
Thus, we can understand that the LCM of 638,368,640,688 is 201914240.
LCM of two or more Numbers Calculation Examples
Here are some samples of LCM of two or more Numbers calculations.
FAQs on LCM of 638, 368, 640, 688
1. What is the LCM of 638, 368, 640, 688?
Answer: LCM of 638, 368, 640, 688 is 201914240.
2. How to calculate the LCM of 638, 368, 640, 688?
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 638, 368, 640, 688.
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}.