LCM of 821, 645, 391, 903
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 821, 645, 391, 903 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 821, 645, 391, 903. So, keep reading to learn more.
Given numbers are 821,645,391,903
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 821,645,391,903 is 1449364665.
Find LCM of 821,645,391,903 with Prime Factorization
| 3 | 821, 645, 391, 903 |
| 43 | 821, 215, 391, 301 |
| 821, 5, 391, 7 |
Multiply the prime numbers at the bottom and the left side.
3 x 43 x 821 x 5 x 391 x 7 = 1449364665
Therefore, the lowest common multiple of 821,645,391,903 is 1449364665.
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.
821 x 645 x 391 x 903 = 186968041785
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.
821 : 1, 821
645 : 1, 3, 5, 15, 43, 129, 215, 645
391 : 1, 17, 23, 391
903 : 1, 3, 7, 21, 43, 129, 301, 903
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 821,645,391,903, is 1.
Now, the common factors can be found like this.
821:821
645:3x 5x 43
391:17x 23
903:3x 7x 43
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 43 = 129
Therefore, the value for common factors is 129.
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 = 186968041785/(1x129)
LCM = 186968041785/129
LCM = 1449364665
Thus, we can understand that the LCM of 821,645,391,903 is 1449364665.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 821, 645, 391, 903
1. What is the LCM of 821, 645, 391, 903?
Answer: LCM of 821, 645, 391, 903 is 1449364665.
2. How to calculate the LCM of 821, 645, 391, 903?
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 821, 645, 391, 903.
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}.