LCM of 782, 840, 665, 209
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 782, 840, 665, 209 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 782, 840, 665, 209. So, keep reading to learn more.
Given numbers are 782,840,665,209
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 782,840,665,209 is 68643960.
Find LCM of 782,840,665,209 with Prime Factorization
| 2 | 782, 840, 665, 209 |
| 5 | 391, 420, 665, 209 |
| 7 | 391, 84, 133, 209 |
| 19 | 391, 12, 19, 209 |
| 391, 12, 1, 11 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 7 x 19 x 391 x 12 x 1 x 11 = 68643960
Therefore, the lowest common multiple of 782,840,665,209 is 68643960.
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.
782 x 840 x 665 x 209 = 91296466800
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.
782 : 1, 2, 17, 23, 34, 46, 391, 782
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
665 : 1, 5, 7, 19, 35, 95, 133, 665
209 : 1, 11, 19, 209
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 782,840,665,209, is 1.
Now, the common factors can be found like this.
782:2x 17x 23
840:2x 2x 2x 3x 5x 7
665:5x 7x 19
209:11x 19
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 5x 7x 19 = 1330
Therefore, the value for common factors is 1330.
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 = 91296466800/(1x1330)
LCM = 91296466800/1330
LCM = 68643960
Thus, we can understand that the LCM of 782,840,665,209 is 68643960.
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FAQs on LCM of 782, 840, 665, 209
1. What is the LCM of 782, 840, 665, 209?
Answer: LCM of 782, 840, 665, 209 is 68643960.
2. How to calculate the LCM of 782, 840, 665, 209?
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 782, 840, 665, 209.
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}.