LCM of 155, 781, 245, 705, 821
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 155, 781, 245, 705, 821 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 155, 781, 245, 705, 821. So, keep reading to learn more.
Given numbers are 155,781,245,705,821
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 155,781,245,705,821 is 686658944895.
Find LCM of 155,781,245,705,821 with Prime Factorization
| 5 | 155, 781, 245, 705, 821 |
| 31, 781, 49, 141, 821 |
Multiply the prime numbers at the bottom and the left side.
5 x 31 x 781 x 49 x 141 x 821 = 686658944895
Therefore, the lowest common multiple of 155,781,245,705,821 is 686658944895.
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.
155 x 781 x 245 x 705 x 821 = 17166473622375
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.
155 : 1, 5, 31, 155
781 : 1, 11, 71, 781
245 : 1, 5, 7, 35, 49, 245
705 : 1, 3, 5, 15, 47, 141, 235, 705
821 : 1, 821
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 155,781,245,705,821, is 1.
Now, the common factors can be found like this.
155:5x 31
781:11x 71
245:5x 7x 7
705:3x 5x 47
821:821
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
5x 5 = 25
Therefore, the value for common factors is 25.
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 = 17166473622375/(1x25)
LCM = 17166473622375/25
LCM = 686658944895
Thus, we can understand that the LCM of 155,781,245,705,821 is 686658944895.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 155, 781, 245, 705, 821
1. What is the LCM of 155, 781, 245, 705, 821?
Answer: LCM of 155, 781, 245, 705, 821 is 686658944895.
2. How to calculate the LCM of 155, 781, 245, 705, 821?
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 155, 781, 245, 705, 821.
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}.