LCM of 861, 641, 858, 378
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 861, 641, 858, 378 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 861, 641, 858, 378. So, keep reading to learn more.
Given numbers are 861,641,858,378
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 861,641,858,378 is 1420593174.
Find LCM of 861,641,858,378 with Prime Factorization
| 2 | 861, 641, 858, 378 |
| 3 | 861, 641, 429, 189 |
| 7 | 287, 641, 143, 63 |
| 41, 641, 143, 9 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 7 x 41 x 641 x 143 x 9 = 1420593174
Therefore, the lowest common multiple of 861,641,858,378 is 1420593174.
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.
861 x 641 x 858 x 378 = 178994739924
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.
861 : 1, 3, 7, 21, 41, 123, 287, 861
641 : 1, 641
858 : 1, 2, 3, 6, 11, 13, 22, 26, 33, 39, 66, 78, 143, 286, 429, 858
378 : 1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 189, 378
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 861,641,858,378, is 1.
Now, the common factors can be found like this.
861:3x 7x 41
641:641
858:2x 3x 11x 13
378:2x 3x 3x 3x 7
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 3x 7 = 126
Therefore, the value for common factors is 126.
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 = 178994739924/(1x126)
LCM = 178994739924/126
LCM = 1420593174
Thus, we can understand that the LCM of 861,641,858,378 is 1420593174.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 861, 641, 858, 378
1. What is the LCM of 861, 641, 858, 378?
Answer: LCM of 861, 641, 858, 378 is 1420593174.
2. How to calculate the LCM of 861, 641, 858, 378?
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 861, 641, 858, 378.
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}.