LCM of 387, 781, 561, 331
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 387, 781, 561, 331 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 387, 781, 561, 331. So, keep reading to learn more.
Given numbers are 387,781,561,331
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 387,781,561,331 is 1700743869.
Find LCM of 387,781,561,331 with Prime Factorization
| 3 | 387, 781, 561, 331 |
| 11 | 129, 781, 187, 331 |
| 129, 71, 17, 331 |
Multiply the prime numbers at the bottom and the left side.
3 x 11 x 129 x 71 x 17 x 331 = 1700743869
Therefore, the lowest common multiple of 387,781,561,331 is 1700743869.
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.
387 x 781 x 561 x 331 = 56124547677
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.
387 : 1, 3, 9, 43, 129, 387
781 : 1, 11, 71, 781
561 : 1, 3, 11, 17, 33, 51, 187, 561
331 : 1, 331
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 387,781,561,331, is 1.
Now, the common factors can be found like this.
387:3x 3x 43
781:11x 71
561:3x 11x 17
331:331
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 11 = 33
Therefore, the value for common factors is 33.
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 = 56124547677/(1x33)
LCM = 56124547677/33
LCM = 1700743869
Thus, we can understand that the LCM of 387,781,561,331 is 1700743869.
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FAQs on LCM of 387, 781, 561, 331
1. What is the LCM of 387, 781, 561, 331?
Answer: LCM of 387, 781, 561, 331 is 1700743869.
2. How to calculate the LCM of 387, 781, 561, 331?
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 387, 781, 561, 331.
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}.