LCM of 256, 781, 345, 645
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 256, 781, 345, 645 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 256, 781, 345, 645. So, keep reading to learn more.
Given numbers are 256,781,345,645
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 256,781,345,645 is 2966050560.
Find LCM of 256,781,345,645 with Prime Factorization
| 3 | 256, 781, 345, 645 |
| 5 | 256, 781, 115, 215 |
| 256, 781, 23, 43 |
Multiply the prime numbers at the bottom and the left side.
3 x 5 x 256 x 781 x 23 x 43 = 2966050560
Therefore, the lowest common multiple of 256,781,345,645 is 2966050560.
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.
256 x 781 x 345 x 645 = 44490758400
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.
256 : 1, 2, 4, 8, 16, 32, 64, 128, 256
781 : 1, 11, 71, 781
345 : 1, 3, 5, 15, 23, 69, 115, 345
645 : 1, 3, 5, 15, 43, 129, 215, 645
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 256,781,345,645, is 1.
Now, the common factors can be found like this.
256:2x 2x 2x 2x 2x 2x 2x 2
781:11x 71
345:3x 5x 23
645:3x 5x 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 5 = 15
Therefore, the value for common factors is 15.
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 = 44490758400/(1x15)
LCM = 44490758400/15
LCM = 2966050560
Thus, we can understand that the LCM of 256,781,345,645 is 2966050560.
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FAQs on LCM of 256, 781, 345, 645
1. What is the LCM of 256, 781, 345, 645?
Answer: LCM of 256, 781, 345, 645 is 2966050560.
2. How to calculate the LCM of 256, 781, 345, 645?
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 256, 781, 345, 645.
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}.