LCM of 731, 645, 195, 42
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 731, 645, 195, 42 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 731, 645, 195, 42. So, keep reading to learn more.
Given numbers are 731,645,195,42
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 731,645,195,42 is 1995630.
Find LCM of 731,645,195,42 with Prime Factorization
| 3 | 731, 645, 195, 42 |
| 5 | 731, 215, 65, 14 |
| 43 | 731, 43, 13, 14 |
| 17, 1, 13, 14 |
Multiply the prime numbers at the bottom and the left side.
3 x 5 x 43 x 17 x 1 x 13 x 14 = 1995630
Therefore, the lowest common multiple of 731,645,195,42 is 1995630.
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.
731 x 645 x 195 x 42 = 3861544050
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.
731 : 1, 17, 43, 731
645 : 1, 3, 5, 15, 43, 129, 215, 645
195 : 1, 3, 5, 13, 15, 39, 65, 195
42 : 1, 2, 3, 6, 7, 14, 21, 42
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 731,645,195,42, is 1.
Now, the common factors can be found like this.
731:17x 43
645:3x 5x 43
195:3x 5x 13
42:2x 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.
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 = 3861544050/(1x1935)
LCM = 3861544050/1935
LCM = 1995630
Thus, we can understand that the LCM of 731,645,195,42 is 1995630.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 731, 645, 195, 42
1. What is the LCM of 731, 645, 195, 42?
Answer: LCM of 731, 645, 195, 42 is 1995630.
2. How to calculate the LCM of 731, 645, 195, 42?
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 731, 645, 195, 42.
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}.