LCM of 800, 490, 780
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 800, 490, 780 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 800, 490, 780. So, keep reading to learn more.
Given numbers are 800,490,780
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 800,490,780 is 1528800.
Find LCM of 800,490,780 with Prime Factorization
| 2 | 800, 490, 780 |
| 2 | 400, 245, 390 |
| 5 | 200, 245, 195 |
| 40, 49, 39 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 5 x 40 x 49 x 39 = 1528800
Therefore, the lowest common multiple of 800,490,780 is 1528800.
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.
800 x 490 x 780 = 305760000
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.
800 : 1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 160, 200, 400, 800
490 : 1, 2, 5, 7, 10, 14, 35, 49, 70, 98, 245, 490
780 : 1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 195, 260, 390, 780
10 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 800,490,780, is 10.
Now, the common factors can be found like this.
800:2x 2x 2x 2x 2x 5x 5
490:2x 5x 7x 7
780:2x 2x 3x 5x 13
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 5 = 20
Therefore, the value for common factors is 20.
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 = 305760000/(10x20)
LCM = 305760000/200
LCM = 1528800
Thus, we can understand that the LCM of 800,490,780 is 1528800.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 800, 490, 780
1. What is the LCM of 800, 490, 780?
Answer: LCM of 800, 490, 780 is 1528800.
2. How to calculate the LCM of 800, 490, 780?
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 800, 490, 780.
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}.