LCM of 7, 140, 286, 781
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 7, 140, 286, 781 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 7, 140, 286, 781. So, keep reading to learn more.
Given numbers are 7,140,286,781
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 7,140,286,781 is 1421420.
Find LCM of 7,140,286,781 with Prime Factorization
| 2 | 7, 140, 286, 781 |
| 7 | 7, 70, 143, 781 |
| 11 | 1, 10, 143, 781 |
| 1, 10, 13, 71 |
Multiply the prime numbers at the bottom and the left side.
2 x 7 x 11 x 1 x 10 x 13 x 71 = 1421420
Therefore, the lowest common multiple of 7,140,286,781 is 1421420.
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.
7 x 140 x 286 x 781 = 218898680
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.
7 : 1, 7
140 : 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140
286 : 1, 2, 11, 13, 22, 26, 143, 286
781 : 1, 11, 71, 781
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 7,140,286,781, is 1.
Now, the common factors can be found like this.
7:7
140:2x 2x 5x 7
286:2x 11x 13
781:11x 71
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 7x 11 = 154
Therefore, the value for common factors is 154.
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 = 218898680/(1x154)
LCM = 218898680/154
LCM = 1421420
Thus, we can understand that the LCM of 7,140,286,781 is 1421420.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 7, 140, 286, 781
1. What is the LCM of 7, 140, 286, 781?
Answer: LCM of 7, 140, 286, 781 is 1421420.
2. How to calculate the LCM of 7, 140, 286, 781?
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 7, 140, 286, 781.
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}.