LCM of 981, 578, 436, 642
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 981, 578, 436, 642 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 981, 578, 436, 642. So, keep reading to learn more.
Given numbers are 981,578,436,642
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 981,578,436,642 is 121341852.
Find LCM of 981,578,436,642 with Prime Factorization
| 2 | 981, 578, 436, 642 |
| 3 | 981, 289, 218, 321 |
| 109 | 327, 289, 218, 107 |
| 3, 289, 2, 107 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 109 x 3 x 289 x 2 x 107 = 121341852
Therefore, the lowest common multiple of 981,578,436,642 is 121341852.
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.
981 x 578 x 436 x 642 = 158715142416
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.
981 : 1, 3, 9, 109, 327, 981
578 : 1, 2, 17, 34, 289, 578
436 : 1, 2, 4, 109, 218, 436
642 : 1, 2, 3, 6, 107, 214, 321, 642
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 981,578,436,642, is 1.
Now, the common factors can be found like this.
981:3x 3x 109
578:2x 17x 17
436:2x 2x 109
642:2x 3x 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 3x 109 = 1308
Therefore, the value for common factors is 1308.
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 = 158715142416/(1x1308)
LCM = 158715142416/1308
LCM = 121341852
Thus, we can understand that the LCM of 981,578,436,642 is 121341852.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 981, 578, 436, 642
1. What is the LCM of 981, 578, 436, 642?
Answer: LCM of 981, 578, 436, 642 is 121341852.
2. How to calculate the LCM of 981, 578, 436, 642?
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 981, 578, 436, 642.
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}.