LCM of 905, 390, 690, 815
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 905, 390, 690, 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 905, 390, 690, 815. So, keep reading to learn more.
Given numbers are 905,390,690,815
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 905,390,690,815 is 264641910.
Find LCM of 905,390,690,815 with Prime Factorization
| 2 | 905, 390, 690, 815 |
| 3 | 905, 195, 345, 815 |
| 5 | 905, 65, 115, 815 |
| 181, 13, 23, 163 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 181 x 13 x 23 x 163 = 264641910
Therefore, the lowest common multiple of 905,390,690,815 is 264641910.
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.
905 x 390 x 690 x 815 = 198481432500
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.
905 : 1, 5, 181, 905
390 : 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390
690 : 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690
815 : 1, 5, 163, 815
5 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 905,390,690,815, is 5.
Now, the common factors can be found like this.
905:5x 181
390:2x 3x 5x 13
690:2x 3x 5x 23
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 3x 5x 5 = 150
Therefore, the value for common factors is 150.
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 = 198481432500/(5x150)
LCM = 198481432500/750
LCM = 264641910
Thus, we can understand that the LCM of 905,390,690,815 is 264641910.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 905, 390, 690, 815
1. What is the LCM of 905, 390, 690, 815?
Answer: LCM of 905, 390, 690, 815 is 264641910.
2. How to calculate the LCM of 905, 390, 690, 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 905, 390, 690, 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}.