LCM of 870, 772, 643, 221, 978
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 870, 772, 643, 221, 978 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 870, 772, 643, 221, 978. So, keep reading to learn more.
Given numbers are 870,772,643,221,978
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 870,772,643,221,978 is 7778527801980.
Find LCM of 870,772,643,221,978 with Prime Factorization
| 2 | 870, 772, 643, 221, 978 |
| 3 | 435, 386, 643, 221, 489 |
| 145, 386, 643, 221, 163 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 145 x 386 x 643 x 221 x 163 = 7778527801980
Therefore, the lowest common multiple of 870,772,643,221,978 is 7778527801980.
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.
870 x 772 x 643 x 221 x 978 = 93342333623760
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.
870 : 1, 2, 3, 5, 6, 10, 15, 29, 30, 58, 87, 145, 174, 290, 435, 870
772 : 1, 2, 4, 193, 386, 772
643 : 1, 643
221 : 1, 13, 17, 221
978 : 1, 2, 3, 6, 163, 326, 489, 978
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 870,772,643,221,978, is 1.
Now, the common factors can be found like this.
870:2x 3x 5x 29
772:2x 2x 193
643:643
221:13x 17
978:2x 3x 163
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 3 = 12
Therefore, the value for common factors is 12.
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 = 93342333623760/(1x12)
LCM = 93342333623760/12
LCM = 7778527801980
Thus, we can understand that the LCM of 870,772,643,221,978 is 7778527801980.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 870, 772, 643, 221, 978
1. What is the LCM of 870, 772, 643, 221, 978?
Answer: LCM of 870, 772, 643, 221, 978 is 7778527801980.
2. How to calculate the LCM of 870, 772, 643, 221, 978?
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 870, 772, 643, 221, 978.
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}.