LCM of 438, 645, 946, 721
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 438, 645, 946, 721 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 438, 645, 946, 721. So, keep reading to learn more.
Given numbers are 438,645,946,721
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 438,645,946,721 is 746862270.
Find LCM of 438,645,946,721 with Prime Factorization
| 2 | 438, 645, 946, 721 |
| 3 | 219, 645, 473, 721 |
| 43 | 73, 215, 473, 721 |
| 73, 5, 11, 721 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 43 x 73 x 5 x 11 x 721 = 746862270
Therefore, the lowest common multiple of 438,645,946,721 is 746862270.
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.
438 x 645 x 946 x 721 = 192690465660
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.
438 : 1, 2, 3, 6, 73, 146, 219, 438
645 : 1, 3, 5, 15, 43, 129, 215, 645
946 : 1, 2, 11, 22, 43, 86, 473, 946
721 : 1, 7, 103, 721
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 438,645,946,721, is 1.
Now, the common factors can be found like this.
438:2x 3x 73
645:3x 5x 43
946:2x 11x 43
721:7x 103
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 3x 43 = 258
Therefore, the value for common factors is 258.
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 = 192690465660/(1x258)
LCM = 192690465660/258
LCM = 746862270
Thus, we can understand that the LCM of 438,645,946,721 is 746862270.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 438, 645, 946, 721
1. What is the LCM of 438, 645, 946, 721?
Answer: LCM of 438, 645, 946, 721 is 746862270.
2. How to calculate the LCM of 438, 645, 946, 721?
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 438, 645, 946, 721.
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}.