LCM of 749, 643, 338, 840
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 749, 643, 338, 840 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 749, 643, 338, 840. So, keep reading to learn more.
Given numbers are 749,643,338,840
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 749,643,338,840 is 9766989960.
Find LCM of 749,643,338,840 with Prime Factorization
| 2 | 749, 643, 338, 840 |
| 7 | 749, 643, 169, 420 |
| 107, 643, 169, 60 |
Multiply the prime numbers at the bottom and the left side.
2 x 7 x 107 x 643 x 169 x 60 = 9766989960
Therefore, the lowest common multiple of 749,643,338,840 is 9766989960.
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.
749 x 643 x 338 x 840 = 136737859440
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.
749 : 1, 7, 107, 749
643 : 1, 643
338 : 1, 2, 13, 26, 169, 338
840 : 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 749,643,338,840, is 1.
Now, the common factors can be found like this.
749:7x 107
643:643
338:2x 13x 13
840:2x 2x 2x 3x 5x 7
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 7 = 14
Therefore, the value for common factors is 14.
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 = 136737859440/(1x14)
LCM = 136737859440/14
LCM = 9766989960
Thus, we can understand that the LCM of 749,643,338,840 is 9766989960.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 749, 643, 338, 840
1. What is the LCM of 749, 643, 338, 840?
Answer: LCM of 749, 643, 338, 840 is 9766989960.
2. How to calculate the LCM of 749, 643, 338, 840?
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 749, 643, 338, 840.
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}.