LCM of 781, 428, 812, 749
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 781, 428, 812, 749 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, 428, 812, 749. So, keep reading to learn more.
Given numbers are 781,428,812,749
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 781,428,812,749 is 67856404.
Find LCM of 781,428,812,749 with Prime Factorization
| 2 | 781, 428, 812, 749 |
| 2 | 781, 214, 406, 749 |
| 7 | 781, 107, 203, 749 |
| 107 | 781, 107, 29, 107 |
| 781, 1, 29, 1 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 7 x 107 x 781 x 1 x 29 x 1 = 67856404
Therefore, the lowest common multiple of 781,428,812,749 is 67856404.
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 428 x 812 x 749 = 203297786384
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
428 : 1, 2, 4, 107, 214, 428
812 : 1, 2, 4, 7, 14, 28, 29, 58, 116, 203, 406, 812
749 : 1, 7, 107, 749
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 781,428,812,749, is 1.
Now, the common factors can be found like this.
781:11x 71
428:2x 2x 107
812:2x 2x 7x 29
749:7x 107
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 7x 107 = 2996
Therefore, the value for common factors is 2996.
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 = 203297786384/(1x2996)
LCM = 203297786384/2996
LCM = 67856404
Thus, we can understand that the LCM of 781,428,812,749 is 67856404.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 781, 428, 812, 749
1. What is the LCM of 781, 428, 812, 749?
Answer: LCM of 781, 428, 812, 749 is 67856404.
2. How to calculate the LCM of 781, 428, 812, 749?
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, 428, 812, 749.
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}.