LCM of 115, 680, 640
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 115, 680, 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 115, 680, 640. So, keep reading to learn more.
Given numbers are 115,680,640
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 115,680,640 is 250240.
Find LCM of 115,680,640 with Prime Factorization
| 2 | 115, 680, 640 |
| 2 | 115, 340, 320 |
| 2 | 115, 170, 160 |
| 5 | 115, 85, 80 |
| 23, 17, 16 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 5 x 23 x 17 x 16 = 250240
Therefore, the lowest common multiple of 115,680,640 is 250240.
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.
115 x 680 x 640 = 50048000
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.
115 : 1, 5, 23, 115
680 : 1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680
640 : 1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640
5 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 115,680,640, is 5.
Now, the common factors can be found like this.
115:5x 23
680:2x 2x 2x 5x 17
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 2x 2x 5 = 40
Therefore, the value for common factors is 40.
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 = 50048000/(5x40)
LCM = 50048000/200
LCM = 250240
Thus, we can understand that the LCM of 115,680,640 is 250240.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 115, 680, 640
1. What is the LCM of 115, 680, 640?
Answer: LCM of 115, 680, 640 is 250240.
2. How to calculate the LCM of 115, 680, 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 115, 680, 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}.