LCM of 915, 744, 128, 856
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 915, 744, 128, 856 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 915, 744, 128, 856. So, keep reading to learn more.
Given numbers are 915,744,128,856
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 915,744,128,856 is 388487040.
Find LCM of 915,744,128,856 with Prime Factorization
| 2 | 915, 744, 128, 856 |
| 2 | 915, 372, 64, 428 |
| 2 | 915, 186, 32, 214 |
| 3 | 915, 93, 16, 107 |
| 305, 31, 16, 107 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 3 x 305 x 31 x 16 x 107 = 388487040
Therefore, the lowest common multiple of 915,744,128,856 is 388487040.
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.
915 x 744 x 128 x 856 = 74589511680
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.
915 : 1, 3, 5, 15, 61, 183, 305, 915
744 : 1, 2, 3, 4, 6, 8, 12, 24, 31, 62, 93, 124, 186, 248, 372, 744
128 : 1, 2, 4, 8, 16, 32, 64, 128
856 : 1, 2, 4, 8, 107, 214, 428, 856
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 915,744,128,856, is 1.
Now, the common factors can be found like this.
915:3x 5x 61
744:2x 2x 2x 3x 31
128:2x 2x 2x 2x 2x 2x 2
856:2x 2x 2x 107
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 2x 2x 2x 3 = 192
Therefore, the value for common factors is 192.
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 = 74589511680/(1x192)
LCM = 74589511680/192
LCM = 388487040
Thus, we can understand that the LCM of 915,744,128,856 is 388487040.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 915, 744, 128, 856
1. What is the LCM of 915, 744, 128, 856?
Answer: LCM of 915, 744, 128, 856 is 388487040.
2. How to calculate the LCM of 915, 744, 128, 856?
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 915, 744, 128, 856.
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}.