LCM of 671, 784, 840, 680
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 671, 784, 840, 680 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 671, 784, 840, 680. So, keep reading to learn more.
Given numbers are 671,784,840,680
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 671,784,840,680 is 134146320.
Find LCM of 671,784,840,680 with Prime Factorization
| 2 | 671, 784, 840, 680 |
| 2 | 671, 392, 420, 340 |
| 2 | 671, 196, 210, 170 |
| 5 | 671, 98, 105, 85 |
| 7 | 671, 98, 21, 17 |
| 671, 14, 3, 17 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 2 x 5 x 7 x 671 x 14 x 3 x 17 = 134146320
Therefore, the lowest common multiple of 671,784,840,680 is 134146320.
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.
671 x 784 x 840 x 680 = 300487756800
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.
671 : 1, 11, 61, 671
784 : 1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 98, 112, 196, 392, 784
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
680 : 1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 671,784,840,680, is 1.
Now, the common factors can be found like this.
671:11x 61
784:2x 2x 2x 2x 7x 7
840:2x 2x 2x 3x 5x 7
680:2x 2x 2x 5x 17
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 2x 2x 2x 2x 5x 7 = 2240
Therefore, the value for common factors is 2240.
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 = 300487756800/(1x2240)
LCM = 300487756800/2240
LCM = 134146320
Thus, we can understand that the LCM of 671,784,840,680 is 134146320.
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FAQs on LCM of 671, 784, 840, 680
1. What is the LCM of 671, 784, 840, 680?
Answer: LCM of 671, 784, 840, 680 is 134146320.
2. How to calculate the LCM of 671, 784, 840, 680?
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 671, 784, 840, 680.
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}.