LCM of 828, 420, 939, 865
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 828, 420, 939, 865 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 828, 420, 939, 865. So, keep reading to learn more.
Given numbers are 828,420,939,865
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 828,420,939,865 is 1569238020.
Find LCM of 828,420,939,865 with Prime Factorization
| 2 | 828, 420, 939, 865 |
| 2 | 414, 210, 939, 865 |
| 3 | 207, 105, 939, 865 |
| 5 | 69, 35, 313, 865 |
| 69, 7, 313, 173 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 5 x 69 x 7 x 313 x 173 = 1569238020
Therefore, the lowest common multiple of 828,420,939,865 is 1569238020.
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.
828 x 420 x 939 x 865 = 282462843600
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.
828 : 1, 2, 3, 4, 6, 9, 12, 18, 23, 36, 46, 69, 92, 138, 207, 276, 414, 828
420 : 1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 420
939 : 1, 3, 313, 939
865 : 1, 5, 173, 865
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 828,420,939,865, is 1.
Now, the common factors can be found like this.
828:2x 2x 3x 3x 23
420:2x 2x 3x 5x 7
939:3x 313
865:5x 173
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 3x 3x 5 = 180
Therefore, the value for common factors is 180.
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 = 282462843600/(1x180)
LCM = 282462843600/180
LCM = 1569238020
Thus, we can understand that the LCM of 828,420,939,865 is 1569238020.
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FAQs on LCM of 828, 420, 939, 865
1. What is the LCM of 828, 420, 939, 865?
Answer: LCM of 828, 420, 939, 865 is 1569238020.
2. How to calculate the LCM of 828, 420, 939, 865?
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 828, 420, 939, 865.
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}.