LCM of 861, 381, 628, 756
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 861, 381, 628, 756 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, 381, 628, 756. So, keep reading to learn more.
Given numbers are 861,381,628,756
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 861,381,628,756 is 618029244.
Find LCM of 861,381,628,756 with Prime Factorization
| 2 | 861, 381, 628, 756 |
| 2 | 861, 381, 314, 378 |
| 3 | 861, 381, 157, 189 |
| 7 | 287, 127, 157, 63 |
| 41, 127, 157, 9 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 7 x 41 x 127 x 157 x 9 = 618029244
Therefore, the lowest common multiple of 861,381,628,756 is 618029244.
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 381 x 628 x 756 = 155743369488
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
381 : 1, 3, 127, 381
628 : 1, 2, 4, 157, 314, 628
756 : 1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 27, 28, 36, 42, 54, 63, 84, 108, 126, 189, 252, 378, 756
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 861,381,628,756, is 1.
Now, the common factors can be found like this.
861:3x 7x 41
381:3x 127
628:2x 2x 157
756:2x 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 2x 3x 3x 7 = 252
Therefore, the value for common factors is 252.
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 = 155743369488/(1x252)
LCM = 155743369488/252
LCM = 618029244
Thus, we can understand that the LCM of 861,381,628,756 is 618029244.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 861, 381, 628, 756
1. What is the LCM of 861, 381, 628, 756?
Answer: LCM of 861, 381, 628, 756 is 618029244.
2. How to calculate the LCM of 861, 381, 628, 756?
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, 381, 628, 756.
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}.