LCM of 961, 731, 390, 765
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 961, 731, 390, 765 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 961, 731, 390, 765. So, keep reading to learn more.
Given numbers are 961,731,390,765
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 961,731,390,765 is 821914470.
Find LCM of 961,731,390,765 with Prime Factorization
| 3 | 961, 731, 390, 765 |
| 5 | 961, 731, 130, 255 |
| 17 | 961, 731, 26, 51 |
| 961, 43, 26, 3 |
Multiply the prime numbers at the bottom and the left side.
3 x 5 x 17 x 961 x 43 x 26 x 3 = 821914470
Therefore, the lowest common multiple of 961,731,390,765 is 821914470.
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.
961 x 731 x 390 x 765 = 209588189850
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.
961 : 1, 31, 961
731 : 1, 17, 43, 731
390 : 1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390
765 : 1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 961,731,390,765, is 1.
Now, the common factors can be found like this.
961:31x 31
731:17x 43
390:2x 3x 5x 13
765:3x 3x 5x 17
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 5x 17 = 255
Therefore, the value for common factors is 255.
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 = 209588189850/(1x255)
LCM = 209588189850/255
LCM = 821914470
Thus, we can understand that the LCM of 961,731,390,765 is 821914470.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 961, 731, 390, 765
1. What is the LCM of 961, 731, 390, 765?
Answer: LCM of 961, 731, 390, 765 is 821914470.
2. How to calculate the LCM of 961, 731, 390, 765?
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 961, 731, 390, 765.
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}.