LCM of 120, 687, 381, 765, 974
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 120, 687, 381, 765, 974 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 120, 687, 381, 765, 974. So, keep reading to learn more.
Given numbers are 120,687,381,765,974
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 120,687,381,765,974 is 86680136520.
Find LCM of 120,687,381,765,974 with Prime Factorization
| 2 | 120, 687, 381, 765, 974 |
| 3 | 60, 687, 381, 765, 487 |
| 5 | 20, 229, 127, 255, 487 |
| 4, 229, 127, 51, 487 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 4 x 229 x 127 x 51 x 487 = 86680136520
Therefore, the lowest common multiple of 120,687,381,765,974 is 86680136520.
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.
120 x 687 x 381 x 765 x 974 = 23403636860400
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.
120 : 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120
687 : 1, 3, 229, 687
381 : 1, 3, 127, 381
765 : 1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765
974 : 1, 2, 487, 974
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 120,687,381,765,974, is 1.
Now, the common factors can be found like this.
120:2x 2x 2x 3x 5
687:3x 229
381:3x 127
765:3x 3x 5x 17
974:2x 487
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 3x 3x 5 = 270
Therefore, the value for common factors is 270.
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 = 23403636860400/(1x270)
LCM = 23403636860400/270
LCM = 86680136520
Thus, we can understand that the LCM of 120,687,381,765,974 is 86680136520.
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FAQs on LCM of 120, 687, 381, 765, 974
1. What is the LCM of 120, 687, 381, 765, 974?
Answer: LCM of 120, 687, 381, 765, 974 is 86680136520.
2. How to calculate the LCM of 120, 687, 381, 765, 974?
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 120, 687, 381, 765, 974.
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}.