LCM of 705, 987, 821, 405
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 705, 987, 821, 405 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 705, 987, 821, 405. So, keep reading to learn more.
Given numbers are 705,987,821,405
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 705,987,821,405 is 109394145.
Find LCM of 705,987,821,405 with Prime Factorization
| 3 | 705, 987, 821, 405 |
| 5 | 235, 329, 821, 135 |
| 47 | 47, 329, 821, 27 |
| 1, 7, 821, 27 |
Multiply the prime numbers at the bottom and the left side.
3 x 5 x 47 x 1 x 7 x 821 x 27 = 109394145
Therefore, the lowest common multiple of 705,987,821,405 is 109394145.
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.
705 x 987 x 821 x 405 = 231368616675
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.
705 : 1, 3, 5, 15, 47, 141, 235, 705
987 : 1, 3, 7, 21, 47, 141, 329, 987
821 : 1, 821
405 : 1, 3, 5, 9, 15, 27, 45, 81, 135, 405
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 705,987,821,405, is 1.
Now, the common factors can be found like this.
705:3x 5x 47
987:3x 7x 47
821:821
405:3x 3x 3x 3x 5
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 3x 5x 47 = 2115
Therefore, the value for common factors is 2115.
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 = 231368616675/(1x2115)
LCM = 231368616675/2115
LCM = 109394145
Thus, we can understand that the LCM of 705,987,821,405 is 109394145.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 705, 987, 821, 405
1. What is the LCM of 705, 987, 821, 405?
Answer: LCM of 705, 987, 821, 405 is 109394145.
2. How to calculate the LCM of 705, 987, 821, 405?
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 705, 987, 821, 405.
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}.