LCM of 638, 408, 393, 721
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 638, 408, 393, 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 638, 408, 393, 721. So, keep reading to learn more.
Given numbers are 638,408,393,721
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 638,408,393,721 is 12292986552.
Find LCM of 638,408,393,721 with Prime Factorization
| 2 | 638, 408, 393, 721 |
| 3 | 319, 204, 393, 721 |
| 319, 68, 131, 721 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 319 x 68 x 131 x 721 = 12292986552
Therefore, the lowest common multiple of 638,408,393,721 is 12292986552.
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.
638 x 408 x 393 x 721 = 73757919312
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.
638 : 1, 2, 11, 22, 29, 58, 319, 638
408 : 1, 2, 3, 4, 6, 8, 12, 17, 24, 34, 51, 68, 102, 136, 204, 408
393 : 1, 3, 131, 393
721 : 1, 7, 103, 721
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 638,408,393,721, is 1.
Now, the common factors can be found like this.
638:2x 11x 29
408:2x 2x 2x 3x 17
393:3x 131
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 3 = 6
Therefore, the value for common factors is 6.
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 = 73757919312/(1x6)
LCM = 73757919312/6
LCM = 12292986552
Thus, we can understand that the LCM of 638,408,393,721 is 12292986552.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 638, 408, 393, 721
1. What is the LCM of 638, 408, 393, 721?
Answer: LCM of 638, 408, 393, 721 is 12292986552.
2. How to calculate the LCM of 638, 408, 393, 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 638, 408, 393, 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}.