LCM of 785, 212, 805, 840
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 785, 212, 805, 840 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 785, 212, 805, 840. So, keep reading to learn more.
Given numbers are 785,212,805,840
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 785,212,805,840 is 160761720.
Find LCM of 785,212,805,840 with Prime Factorization
| 2 | 785, 212, 805, 840 |
| 2 | 785, 106, 805, 420 |
| 5 | 785, 53, 805, 210 |
| 7 | 157, 53, 161, 42 |
| 157, 53, 23, 6 |
Multiply the prime numbers at the bottom and the left side.
2 x 2 x 5 x 7 x 157 x 53 x 23 x 6 = 160761720
Therefore, the lowest common multiple of 785,212,805,840 is 160761720.
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.
785 x 212 x 805 x 840 = 112533204000
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.
785 : 1, 5, 157, 785
212 : 1, 2, 4, 53, 106, 212
805 : 1, 5, 7, 23, 35, 115, 161, 805
840 : 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 785,212,805,840, is 1.
Now, the common factors can be found like this.
785:5x 157
212:2x 2x 53
805:5x 7x 23
840:2x 2x 2x 3x 5x 7
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 5x 7 = 700
Therefore, the value for common factors is 700.
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 = 112533204000/(1x700)
LCM = 112533204000/700
LCM = 160761720
Thus, we can understand that the LCM of 785,212,805,840 is 160761720.
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FAQs on LCM of 785, 212, 805, 840
1. What is the LCM of 785, 212, 805, 840?
Answer: LCM of 785, 212, 805, 840 is 160761720.
2. How to calculate the LCM of 785, 212, 805, 840?
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 785, 212, 805, 840.
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}.