LCM of 961, 420, 645, 129
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 961, 420, 645, 129 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 961, 420, 645, 129. So, keep reading to learn more.
Given numbers are 961,420,645,129
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 961,420,645,129 is 17355660.
Find LCM of 961,420,645,129 with Prime Factorization
| 3 | 961, 420, 645, 129 |
| 5 | 961, 140, 215, 43 |
| 43 | 961, 28, 43, 43 |
| 961, 28, 1, 1 |
Multiply the prime numbers at the bottom and the left side.
3 x 5 x 43 x 961 x 28 x 1 x 1 = 17355660
Therefore, the lowest common multiple of 961,420,645,129 is 17355660.
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.
961 x 420 x 645 x 129 = 33583202100
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.
961 : 1, 31, 961
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
645 : 1, 3, 5, 15, 43, 129, 215, 645
129 : 1, 3, 43, 129
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 961,420,645,129, is 1.
Now, the common factors can be found like this.
961:31x 31
420:2x 2x 3x 5x 7
645:3x 5x 43
129:3x 43
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
3x 3x 5x 43 = 1935
Therefore, the value for common factors is 1935.
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 = 33583202100/(1x1935)
LCM = 33583202100/1935
LCM = 17355660
Thus, we can understand that the LCM of 961,420,645,129 is 17355660.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 961, 420, 645, 129
1. What is the LCM of 961, 420, 645, 129?
Answer: LCM of 961, 420, 645, 129 is 17355660.
2. How to calculate the LCM of 961, 420, 645, 129?
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 961, 420, 645, 129.
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}.