LCM of 815, 840, 770, 220
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 815, 840, 770, 220 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 815, 840, 770, 220. So, keep reading to learn more.
Given numbers are 815,840,770,220
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 815,840,770,220 is 1506120.
Find LCM of 815,840,770,220 with Prime Factorization
| 2 | 815, 840, 770, 220 |
| 2 | 815, 420, 385, 110 |
| 5 | 815, 210, 385, 55 |
| 7 | 163, 42, 77, 11 |
| 11 | 163, 6, 11, 11 |
| 163, 6, 1, 1 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 5 x 7 x 11 x 163 x 6 x 1 x 1 = 1506120
Therefore, the lowest common multiple of 815,840,770,220 is 1506120.
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.
815 x 840 x 770 x 220 = 115971240000
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.
815 : 1, 5, 163, 815
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
770 : 1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 154, 385, 770
220 : 1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220
5 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 815,840,770,220, is 5.
Now, the common factors can be found like this.
815:5x 163
840:2x 2x 2x 3x 5x 7
770:2x 5x 7x 11
220:2x 2x 5x 11
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 5x 5x 7x 11 = 15400
Therefore, the value for common factors is 15400.
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 = 115971240000/(5x15400)
LCM = 115971240000/77000
LCM = 1506120
Thus, we can understand that the LCM of 815,840,770,220 is 1506120.
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FAQs on LCM of 815, 840, 770, 220
1. What is the LCM of 815, 840, 770, 220?
Answer: LCM of 815, 840, 770, 220 is 1506120.
2. How to calculate the LCM of 815, 840, 770, 220?
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 815, 840, 770, 220.
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}.