LCM of 331, 781, 820, 660
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 331, 781, 820, 660 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 331, 781, 820, 660. So, keep reading to learn more.
Given numbers are 331,781,820,660
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 331,781,820,660 is 635937060.
Find LCM of 331,781,820,660 with Prime Factorization
| 2 | 331, 781, 820, 660 |
| 2 | 331, 781, 410, 330 |
| 5 | 331, 781, 205, 165 |
| 11 | 331, 781, 41, 33 |
| 331, 71, 41, 3 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 5 x 11 x 331 x 71 x 41 x 3 = 635937060
Therefore, the lowest common multiple of 331,781,820,660 is 635937060.
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.
331 x 781 x 820 x 660 = 139906153200
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.
331 : 1, 331
781 : 1, 11, 71, 781
820 : 1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820
660 : 1, 2, 3, 4, 5, 6, 10, 11, 12, 15, 20, 22, 30, 33, 44, 55, 60, 66, 110, 132, 165, 220, 330, 660
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 331,781,820,660, is 1.
Now, the common factors can be found like this.
331:331
781:11x 71
820:2x 2x 5x 41
660:2x 2x 3x 5x 11
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 5x 11 = 220
Therefore, the value for common factors is 220.
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 = 139906153200/(1x220)
LCM = 139906153200/220
LCM = 635937060
Thus, we can understand that the LCM of 331,781,820,660 is 635937060.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 331, 781, 820, 660
1. What is the LCM of 331, 781, 820, 660?
Answer: LCM of 331, 781, 820, 660 is 635937060.
2. How to calculate the LCM of 331, 781, 820, 660?
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 331, 781, 820, 660.
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}.