LCM of 31, 85, 55, 21, 865
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 31, 85, 55, 21, 865 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 31, 85, 55, 21, 865. So, keep reading to learn more.
Given numbers are 31,85,55,21,865
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 31,85,55,21,865 is 105302505.
Find LCM of 31,85,55,21,865 with Prime Factorization
| 5 | 31, 85, 55, 21, 865 |
| 31, 17, 11, 21, 173 |
Multiply the prime numbers at the bottom and the left side.
5 x 31 x 17 x 11 x 21 x 173 = 105302505
Therefore, the lowest common multiple of 31,85,55,21,865 is 105302505.
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.
31 x 85 x 55 x 21 x 865 = 2632562625
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.
31 : 1, 31
85 : 1, 5, 17, 85
55 : 1, 5, 11, 55
21 : 1, 3, 7, 21
865 : 1, 5, 173, 865
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 31,85,55,21,865, is 1.
Now, the common factors can be found like this.
31:31
85:5x 17
55:5x 11
21:3x 7
865:5x 173
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 = 2632562625/(1x25)
LCM = 2632562625/25
LCM = 105302505
Thus, we can understand that the LCM of 31,85,55,21,865 is 105302505.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 31, 85, 55, 21, 865
1. What is the LCM of 31, 85, 55, 21, 865?
Answer: LCM of 31, 85, 55, 21, 865 is 105302505.
2. How to calculate the LCM of 31, 85, 55, 21, 865?
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 31, 85, 55, 21, 865.
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}.