LCM of 861, 924, 788, 520
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 861, 924, 788, 520 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 861, 924, 788, 520. So, keep reading to learn more.
Given numbers are 861,924,788,520
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 861,924,788,520 is 970209240.
Find LCM of 861,924,788,520 with Prime Factorization
| 2 | 861, 924, 788, 520 |
| 2 | 861, 462, 394, 260 |
| 3 | 861, 231, 197, 130 |
| 7 | 287, 77, 197, 130 |
| 41, 11, 197, 130 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 3 x 7 x 41 x 11 x 197 x 130 = 970209240
Therefore, the lowest common multiple of 861,924,788,520 is 970209240.
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.
861 x 924 x 788 x 520 = 325990304640
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.
861 : 1, 3, 7, 21, 41, 123, 287, 861
924 : 1, 2, 3, 4, 6, 7, 11, 12, 14, 21, 22, 28, 33, 42, 44, 66, 77, 84, 132, 154, 231, 308, 462, 924
788 : 1, 2, 4, 197, 394, 788
520 : 1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 861,924,788,520, is 1.
Now, the common factors can be found like this.
861:3x 7x 41
924:2x 2x 3x 7x 11
788:2x 2x 197
520:2x 2x 2x 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 2x 2x 3x 7 = 336
Therefore, the value for common factors is 336.
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 = 325990304640/(1x336)
LCM = 325990304640/336
LCM = 970209240
Thus, we can understand that the LCM of 861,924,788,520 is 970209240.
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FAQs on LCM of 861, 924, 788, 520
1. What is the LCM of 861, 924, 788, 520?
Answer: LCM of 861, 924, 788, 520 is 970209240.
2. How to calculate the LCM of 861, 924, 788, 520?
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 861, 924, 788, 520.
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}.