LCM of 781, 253, 388, 644
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 781, 253, 388, 644 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, 253, 388, 644. So, keep reading to learn more.
Given numbers are 781,253,388,644
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 781,253,388,644 is 48787508.
Find LCM of 781,253,388,644 with Prime Factorization
| 2 | 781, 253, 388, 644 |
| 2 | 781, 253, 194, 322 |
| 11 | 781, 253, 97, 161 |
| 23 | 71, 23, 97, 161 |
| 71, 1, 97, 7 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 11 x 23 x 71 x 1 x 97 x 7 = 48787508
Therefore, the lowest common multiple of 781,253,388,644 is 48787508.
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 253 x 388 x 644 = 49372958096
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
253 : 1, 11, 23, 253
388 : 1, 2, 4, 97, 194, 388
644 : 1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 781,253,388,644, is 1.
Now, the common factors can be found like this.
781:11x 71
253:11x 23
388:2x 2x 97
644:2x 2x 7x 23
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 2x 11x 23 = 1012
Therefore, the value for common factors is 1012.
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 = 49372958096/(1x1012)
LCM = 49372958096/1012
LCM = 48787508
Thus, we can understand that the LCM of 781,253,388,644 is 48787508.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 781, 253, 388, 644
1. What is the LCM of 781, 253, 388, 644?
Answer: LCM of 781, 253, 388, 644 is 48787508.
2. How to calculate the LCM of 781, 253, 388, 644?
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, 253, 388, 644.
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}.