LCM of 121, 840, 660, 815
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 121, 840, 660, 815 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 121, 840, 660, 815. So, keep reading to learn more.
Given numbers are 121,840,660,815
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 121,840,660,815 is 16567320.
Find LCM of 121,840,660,815 with Prime Factorization
| 2 | 121, 840, 660, 815 |
| 2 | 121, 420, 330, 815 |
| 3 | 121, 210, 165, 815 |
| 5 | 121, 70, 55, 815 |
| 11 | 121, 14, 11, 163 |
| 1, 14, 11, 163 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 11 x 1 x 14 x 11 x 163 = 16567320
Therefore, the lowest common multiple of 121,840,660,815 is 16567320.
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.
121 x 840 x 660 x 815 = 54672156000
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.
121 : 1, 11, 121
840 : 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840
660 : 1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660
815 : 1, 5, 163, 815
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 121,840,660,815, is 1.
Now, the common factors can be found like this.
121:11x 11
840:2x 2x 2x 3x 5x 7
660:2x 2x 3x 5x 11
815:5x 163
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 3x 5x 5x 11 = 3300
Therefore, the value for common factors is 3300.
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 = 54672156000/(1x3300)
LCM = 54672156000/3300
LCM = 16567320
Thus, we can understand that the LCM of 121,840,660,815 is 16567320.
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FAQs on LCM of 121, 840, 660, 815
1. What is the LCM of 121, 840, 660, 815?
Answer: LCM of 121, 840, 660, 815 is 16567320.
2. How to calculate the LCM of 121, 840, 660, 815?
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 121, 840, 660, 815.
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}.