LCM of 781, 646, 171, 462
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 781, 646, 171, 462 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 781, 646, 171, 462. So, keep reading to learn more.
Given numbers are 781,646,171,462
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 781,646,171,462 is 31785138.
Find LCM of 781,646,171,462 with Prime Factorization
| 2 | 781, 646, 171, 462 |
| 3 | 781, 323, 171, 231 |
| 11 | 781, 323, 57, 77 |
| 19 | 71, 323, 57, 7 |
| 71, 17, 3, 7 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 11 x 19 x 71 x 17 x 3 x 7 = 31785138
Therefore, the lowest common multiple of 781,646,171,462 is 31785138.
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.
781 x 646 x 171 x 462 = 39858563052
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.
781 : 1, 11, 71, 781
646 : 1, 2, 17, 19, 34, 38, 323, 646
171 : 1, 3, 9, 19, 57, 171
462 : 1, 2, 3, 6, 7, 11, 14, 21, 22, 33, 42, 66, 77, 154, 231, 462
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 781,646,171,462, is 1.
Now, the common factors can be found like this.
781:11x 71
646:2x 17x 19
171:3x 3x 19
462:2x 3x 7x 11
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 11x 19 = 1254
Therefore, the value for common factors is 1254.
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 = 39858563052/(1x1254)
LCM = 39858563052/1254
LCM = 31785138
Thus, we can understand that the LCM of 781,646,171,462 is 31785138.
LCM of two or more Numbers Calculation Examples
Here are some samples of LCM of two or more Numbers calculations.
FAQs on LCM of 781, 646, 171, 462
1. What is the LCM of 781, 646, 171, 462?
Answer: LCM of 781, 646, 171, 462 is 31785138.
2. How to calculate the LCM of 781, 646, 171, 462?
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 781, 646, 171, 462.
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}.