LCM of 638, 722, 991, 855
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 638, 722, 991, 855 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, 722, 991, 855. So, keep reading to learn more.
Given numbers are 638,722,991,855
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 638,722,991,855 is 10271031210.
Find LCM of 638,722,991,855 with Prime Factorization
| 2 | 638, 722, 991, 855 |
| 19 | 319, 361, 991, 855 |
| 319, 19, 991, 45 |
Multiply the prime numbers at the bottom and the left side.
2 x 19 x 319 x 19 x 991 x 45 = 10271031210
Therefore, the lowest common multiple of 638,722,991,855 is 10271031210.
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 722 x 991 x 855 = 390299185980
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
722 : 1, 2, 19, 38, 361, 722
991 : 1, 991
855 : 1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285, 855
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 638,722,991,855, is 1.
Now, the common factors can be found like this.
638:2x 11x 29
722:2x 19x 19
991:991
855:3x 3x 5x 19
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 19 = 38
Therefore, the value for common factors is 38.
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 = 390299185980/(1x38)
LCM = 390299185980/38
LCM = 10271031210
Thus, we can understand that the LCM of 638,722,991,855 is 10271031210.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 638, 722, 991, 855
1. What is the LCM of 638, 722, 991, 855?
Answer: LCM of 638, 722, 991, 855 is 10271031210.
2. How to calculate the LCM of 638, 722, 991, 855?
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, 722, 991, 855.
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}.