LCM of 398, 129, 392, 784
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 398, 129, 392, 784 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 398, 129, 392, 784. So, keep reading to learn more.
Given numbers are 398,129,392,784
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 398,129,392,784 is 20126064.
Find LCM of 398,129,392,784 with Prime Factorization
| 2 | 398, 129, 392, 784 |
| 2 | 199, 129, 196, 392 |
| 2 | 199, 129, 98, 196 |
| 7 | 199, 129, 49, 98 |
| 7 | 199, 129, 7, 14 |
| 199, 129, 1, 2 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 7 x 7 x 199 x 129 x 1 x 2 = 20126064
Therefore, the lowest common multiple of 398,129,392,784 is 20126064.
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.
398 x 129 x 392 x 784 = 15778834176
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.
398 : 1, 2, 199, 398
129 : 1, 3, 43, 129
392 : 1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 392
784 : 1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 98, 112, 196, 392, 784
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 398,129,392,784, is 1.
Now, the common factors can be found like this.
398:2x 199
129:3x 43
392:2x 2x 2x 7x 7
784:2x 2x 2x 2x 7x 7
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 7x 7 = 784
Therefore, the value for common factors is 784.
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 = 15778834176/(1x784)
LCM = 15778834176/784
LCM = 20126064
Thus, we can understand that the LCM of 398,129,392,784 is 20126064.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 398, 129, 392, 784
1. What is the LCM of 398, 129, 392, 784?
Answer: LCM of 398, 129, 392, 784 is 20126064.
2. How to calculate the LCM of 398, 129, 392, 784?
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 398, 129, 392, 784.
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}.