LCM of 987, 819, 621, 520, 780
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 987, 819, 621, 520, 780 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 987, 819, 621, 520, 780. So, keep reading to learn more.
Given numbers are 987,819,621,520,780
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 987,819,621,520,780 is 106240680.
Find LCM of 987,819,621,520,780 with Prime Factorization
| 2 | 987, 819, 621, 520, 780 |
| 2 | 987, 819, 621, 260, 390 |
| 3 | 987, 819, 621, 130, 195 |
| 3 | 329, 273, 207, 130, 65 |
| 5 | 329, 91, 69, 130, 65 |
| 7 | 329, 91, 69, 26, 13 |
| 13 | 47, 13, 69, 26, 13 |
| 47, 1, 69, 2, 1 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 3 x 5 x 7 x 13 x 47 x 1 x 69 x 2 x 1 = 106240680
Therefore, the lowest common multiple of 987,819,621,520,780 is 106240680.
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.
987 x 819 x 621 x 520 x 780 = 203606013592800
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.
987 : 1, 3, 7, 21, 47, 141, 329, 987
819 : 1, 3, 7, 9, 13, 21, 39, 63, 91, 117, 273, 819
621 : 1, 3, 9, 23, 27, 69, 207, 621
520 : 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520
780 : 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 987,819,621,520,780, is 1.
Now, the common factors can be found like this.
987:3x 7x 47
819:3x 3x 7x 13
621:3x 3x 3x 23
520:2x 2x 2x 5x 13
780:2x 2x 3x 5x 13
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 3x 3x 3x 5x 7x 13x 13 = 1916460
Therefore, the value for common factors is 1916460.
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 = 203606013592800/(1x1916460)
LCM = 203606013592800/1916460
LCM = 106240680
Thus, we can understand that the LCM of 987,819,621,520,780 is 106240680.
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FAQs on LCM of 987, 819, 621, 520, 780
1. What is the LCM of 987, 819, 621, 520, 780?
Answer: LCM of 987, 819, 621, 520, 780 is 106240680.
2. How to calculate the LCM of 987, 819, 621, 520, 780?
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 987, 819, 621, 520, 780.
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}.