LCM of 915, 682, 989, 640
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 915, 682, 989, 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 915, 682, 989, 640. So, keep reading to learn more.
Given numbers are 915,682,989,640
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 915,682,989,640 is 39498602880.
Find LCM of 915,682,989,640 with Prime Factorization
| 2 | 915, 682, 989, 640 |
| 5 | 915, 341, 989, 320 |
| 183, 341, 989, 64 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 183 x 341 x 989 x 64 = 39498602880
Therefore, the lowest common multiple of 915,682,989,640 is 39498602880.
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.
915 x 682 x 989 x 640 = 394986028800
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.
915 : 1, 3, 5, 15, 61, 183, 305, 915
682 : 1, 2, 11, 22, 31, 62, 341, 682
989 : 1, 23, 43, 989
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 915,682,989,640, is 1.
Now, the common factors can be found like this.
915:3x 5x 61
682:2x 11x 31
989:23x 43
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 5 = 10
Therefore, the value for common factors is 10.
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 = 394986028800/(1x10)
LCM = 394986028800/10
LCM = 39498602880
Thus, we can understand that the LCM of 915,682,989,640 is 39498602880.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 915, 682, 989, 640
1. What is the LCM of 915, 682, 989, 640?
Answer: LCM of 915, 682, 989, 640 is 39498602880.
2. How to calculate the LCM of 915, 682, 989, 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 915, 682, 989, 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}.