LCM of 190, 397, 420, 861
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 190, 397, 420, 861 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 190, 397, 420, 861. So, keep reading to learn more.
Given numbers are 190,397,420,861
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 190,397,420,861 is 129890460.
Find LCM of 190,397,420,861 with Prime Factorization
| 2 | 190, 397, 420, 861 |
| 3 | 95, 397, 210, 861 |
| 5 | 95, 397, 70, 287 |
| 7 | 19, 397, 14, 287 |
| 19, 397, 2, 41 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 7 x 19 x 397 x 2 x 41 = 129890460
Therefore, the lowest common multiple of 190,397,420,861 is 129890460.
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.
190 x 397 x 420 x 861 = 27276996600
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.
190 : 1, 2, 5, 10, 19, 38, 95, 190
397 : 1, 397
420 : 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
861 : 1, 3, 7, 21, 41, 123, 287, 861
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 190,397,420,861, is 1.
Now, the common factors can be found like this.
190:2x 5x 19
397:397
420:2x 2x 3x 5x 7
861:3x 7x 41
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 5x 7 = 210
Therefore, the value for common factors is 210.
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 = 27276996600/(1x210)
LCM = 27276996600/210
LCM = 129890460
Thus, we can understand that the LCM of 190,397,420,861 is 129890460.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 190, 397, 420, 861
1. What is the LCM of 190, 397, 420, 861?
Answer: LCM of 190, 397, 420, 861 is 129890460.
2. How to calculate the LCM of 190, 397, 420, 861?
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 190, 397, 420, 861.
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}.