LCM of 781, 140, 611, 940
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 781, 140, 611, 940 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, 140, 611, 940. So, keep reading to learn more.
Given numbers are 781,140,611,940
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 781,140,611,940 is 66806740.
Find LCM of 781,140,611,940 with Prime Factorization
| 2 | 781, 140, 611, 940 |
| 2 | 781, 70, 611, 470 |
| 5 | 781, 35, 611, 235 |
| 47 | 781, 7, 611, 47 |
| 781, 7, 13, 1 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 5 x 47 x 781 x 7 x 13 x 1 = 66806740
Therefore, the lowest common multiple of 781,140,611,940 is 66806740.
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 140 x 611 x 940 = 62798335600
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
140 : 1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140
611 : 1, 13, 47, 611
940 : 1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 781,140,611,940, is 1.
Now, the common factors can be found like this.
781:11x 71
140:2x 2x 5x 7
611:13x 47
940:2x 2x 5x 47
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 5x 47 = 940
Therefore, the value for common factors is 940.
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 = 62798335600/(1x940)
LCM = 62798335600/940
LCM = 66806740
Thus, we can understand that the LCM of 781,140,611,940 is 66806740.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 781, 140, 611, 940
1. What is the LCM of 781, 140, 611, 940?
Answer: LCM of 781, 140, 611, 940 is 66806740.
2. How to calculate the LCM of 781, 140, 611, 940?
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, 140, 611, 940.
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}.