LCM of 685, 394, 921, 315, 990
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 685, 394, 921, 315, 990 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 685, 394, 921, 315, 990. So, keep reading to learn more.
Given numbers are 685,394,921,315,990
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 685,394,921,315,990 is 57419367390.
Find LCM of 685,394,921,315,990 with Prime Factorization
| 2 | 685, 394, 921, 315, 990 |
| 3 | 685, 197, 921, 315, 495 |
| 3 | 685, 197, 307, 105, 165 |
| 5 | 685, 197, 307, 35, 55 |
| 137, 197, 307, 7, 11 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 3 x 5 x 137 x 197 x 307 x 7 x 11 = 57419367390
Therefore, the lowest common multiple of 685,394,921,315,990 is 57419367390.
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.
685 x 394 x 921 x 315 x 990 = 77516145976500
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.
685 : 1, 5, 137, 685
394 : 1, 2, 197, 394
921 : 1, 3, 307, 921
315 : 1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315
990 : 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 685,394,921,315,990, is 1.
Now, the common factors can be found like this.
685:5x 137
394:2x 197
921:3x 307
315:3x 3x 5x 7
990:2x 3x 3x 5x 11
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 3x 3x 3x 5x 5 = 1350
Therefore, the value for common factors is 1350.
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 = 77516145976500/(1x1350)
LCM = 77516145976500/1350
LCM = 57419367390
Thus, we can understand that the LCM of 685,394,921,315,990 is 57419367390.
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FAQs on LCM of 685, 394, 921, 315, 990
1. What is the LCM of 685, 394, 921, 315, 990?
Answer: LCM of 685, 394, 921, 315, 990 is 57419367390.
2. How to calculate the LCM of 685, 394, 921, 315, 990?
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 685, 394, 921, 315, 990.
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}.