LCM of 781, 638, 856, 231
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 781, 638, 856, 231 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 781, 638, 856, 231. So, keep reading to learn more.
Given numbers are 781,638,856,231
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 781,638,856,231 is 407138424.
Find LCM of 781,638,856,231 with Prime Factorization
| 2 | 781, 638, 856, 231 |
| 11 | 781, 319, 428, 231 |
| 71, 29, 428, 21 |
Multiply the prime numbers at the bottom and the left side.
2 x 11 x 71 x 29 x 428 x 21 = 407138424
Therefore, the lowest common multiple of 781,638,856,231 is 407138424.
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.
781 x 638 x 856 x 231 = 98527498608
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.
781 : 1, 11, 71, 781
638 : 1, 2, 11, 22, 29, 58, 319, 638
856 : 1, 2, 4, 8, 107, 214, 428, 856
231 : 1, 3, 7, 11, 21, 33, 77, 231
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 781,638,856,231, is 1.
Now, the common factors can be found like this.
781:11x 71
638:2x 11x 29
856:2x 2x 2x 107
231:3x 7x 11
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 11x 11 = 242
Therefore, the value for common factors is 242.
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 = 98527498608/(1x242)
LCM = 98527498608/242
LCM = 407138424
Thus, we can understand that the LCM of 781,638,856,231 is 407138424.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 781, 638, 856, 231
1. What is the LCM of 781, 638, 856, 231?
Answer: LCM of 781, 638, 856, 231 is 407138424.
2. How to calculate the LCM of 781, 638, 856, 231?
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 781, 638, 856, 231.
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}.