LCM of 805, 187, 420, 128
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 805, 187, 420, 128 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 805, 187, 420, 128. So, keep reading to learn more.
Given numbers are 805,187,420,128
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 805,187,420,128 is 57805440.
Find LCM of 805,187,420,128 with Prime Factorization
| 2 | 805, 187, 420, 128 |
| 2 | 805, 187, 210, 64 |
| 5 | 805, 187, 105, 32 |
| 7 | 161, 187, 21, 32 |
| 23, 187, 3, 32 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 5 x 7 x 23 x 187 x 3 x 32 = 57805440
Therefore, the lowest common multiple of 805,187,420,128 is 57805440.
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.
805 x 187 x 420 x 128 = 8092761600
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.
805 : 1, 5, 7, 23, 35, 115, 161, 805
187 : 1, 11, 17, 187
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
128 : 1, 2, 4, 8, 16, 32, 64, 128
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 805,187,420,128, is 1.
Now, the common factors can be found like this.
805:5x 7x 23
187:11x 17
420:2x 2x 3x 5x 7
128:2x 2x 2x 2x 2x 2x 2
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 5x 7 = 140
Therefore, the value for common factors is 140.
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 = 8092761600/(1x140)
LCM = 8092761600/140
LCM = 57805440
Thus, we can understand that the LCM of 805,187,420,128 is 57805440.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 805, 187, 420, 128
1. What is the LCM of 805, 187, 420, 128?
Answer: LCM of 805, 187, 420, 128 is 57805440.
2. How to calculate the LCM of 805, 187, 420, 128?
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 805, 187, 420, 128.
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}.