LCM of 285, 210, 490, 389, 721
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 285, 210, 490, 389, 721 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 285, 210, 490, 389, 721. So, keep reading to learn more.
Given numbers are 285,210,490,389,721
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 285,210,490,389,721 is 1119071310.
Find LCM of 285,210,490,389,721 with Prime Factorization
| 2 | 285, 210, 490, 389, 721 |
| 3 | 285, 105, 245, 389, 721 |
| 5 | 95, 35, 245, 389, 721 |
| 7 | 19, 7, 49, 389, 721 |
| 19, 1, 7, 389, 103 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 7 x 19 x 1 x 7 x 389 x 103 = 1119071310
Therefore, the lowest common multiple of 285,210,490,389,721 is 1119071310.
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.
285 x 210 x 490 x 389 x 721 = 8225174128500
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.
285 : 1, 3, 5, 15, 19, 57, 95, 285
210 : 1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210
490 : 1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490
389 : 1, 389
721 : 1, 7, 103, 721
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 285,210,490,389,721, is 1.
Now, the common factors can be found like this.
285:3x 5x 19
210:2x 3x 5x 7
490:2x 5x 7x 7
389:389
721:7x 103
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 5x 5x 7x 7 = 7350
Therefore, the value for common factors is 7350.
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 = 8225174128500/(1x7350)
LCM = 8225174128500/7350
LCM = 1119071310
Thus, we can understand that the LCM of 285,210,490,389,721 is 1119071310.
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FAQs on LCM of 285, 210, 490, 389, 721
1. What is the LCM of 285, 210, 490, 389, 721?
Answer: LCM of 285, 210, 490, 389, 721 is 1119071310.
2. How to calculate the LCM of 285, 210, 490, 389, 721?
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 285, 210, 490, 389, 721.
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}.