LCM of 389, 520, 642, 285
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 389, 520, 642, 285 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 389, 520, 642, 285. So, keep reading to learn more.
Given numbers are 389,520,642,285
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 389,520,642,285 is 1233705720.
Find LCM of 389,520,642,285 with Prime Factorization
| 2 | 389, 520, 642, 285 |
| 3 | 389, 260, 321, 285 |
| 5 | 389, 260, 107, 95 |
| 389, 52, 107, 19 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 389 x 52 x 107 x 19 = 1233705720
Therefore, the lowest common multiple of 389,520,642,285 is 1233705720.
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.
389 x 520 x 642 x 285 = 37011171600
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.
389 : 1, 389
520 : 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520
642 : 1, 2, 3, 6, 107, 214, 321, 642
285 : 1, 3, 5, 15, 19, 57, 95, 285
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 389,520,642,285, is 1.
Now, the common factors can be found like this.
389:389
520:2x 2x 2x 5x 13
642:2x 3x 107
285:3x 5x 19
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 5 = 30
Therefore, the value for common factors is 30.
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 = 37011171600/(1x30)
LCM = 37011171600/30
LCM = 1233705720
Thus, we can understand that the LCM of 389,520,642,285 is 1233705720.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 389, 520, 642, 285
1. What is the LCM of 389, 520, 642, 285?
Answer: LCM of 389, 520, 642, 285 is 1233705720.
2. How to calculate the LCM of 389, 520, 642, 285?
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 389, 520, 642, 285.
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}.