LCM of 161, 690, 138, 685
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 161, 690, 138, 685 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 161, 690, 138, 685. So, keep reading to learn more.
Given numbers are 161,690,138,685
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 161,690,138,685 is 661710.
Find LCM of 161,690,138,685 with Prime Factorization
| 2 | 161, 690, 138, 685 |
| 3 | 161, 345, 69, 685 |
| 5 | 161, 115, 23, 685 |
| 23 | 161, 23, 23, 137 |
| 7, 1, 1, 137 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 23 x 7 x 1 x 1 x 137 = 661710
Therefore, the lowest common multiple of 161,690,138,685 is 661710.
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.
161 x 690 x 138 x 685 = 10501337700
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.
161 : 1, 7, 23, 161
690 : 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690
138 : 1, 2, 3, 6, 23, 46, 69, 138
685 : 1, 5, 137, 685
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 161,690,138,685, is 1.
Now, the common factors can be found like this.
161:7x 23
690:2x 3x 5x 23
138:2x 3x 23
685:5x 137
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 3x 5x 23x 23 = 15870
Therefore, the value for common factors is 15870.
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 = 10501337700/(1x15870)
LCM = 10501337700/15870
LCM = 661710
Thus, we can understand that the LCM of 161,690,138,685 is 661710.
LCM of two or more Numbers Calculation Examples
Here are some samples of LCM of two or more Numbers calculations.
FAQs on LCM of 161, 690, 138, 685
1. What is the LCM of 161, 690, 138, 685?
Answer: LCM of 161, 690, 138, 685 is 661710.
2. How to calculate the LCM of 161, 690, 138, 685?
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 161, 690, 138, 685.
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}.