LCM of 217, 770, 642, 605
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 217, 770, 642, 605 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 217, 770, 642, 605. So, keep reading to learn more.
Given numbers are 217,770,642,605
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 217,770,642,605 is 84284970.
Find LCM of 217,770,642,605 with Prime Factorization
| 2 | 217, 770, 642, 605 |
| 5 | 217, 385, 321, 605 |
| 7 | 217, 77, 321, 121 |
| 11 | 31, 11, 321, 121 |
| 31, 1, 321, 11 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 7 x 11 x 31 x 1 x 321 x 11 = 84284970
Therefore, the lowest common multiple of 217,770,642,605 is 84284970.
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.
217 x 770 x 642 x 605 = 64899426900
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.
217 : 1, 7, 31, 217
770 : 1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 154, 385, 770
642 : 1, 2, 3, 6, 107, 214, 321, 642
605 : 1, 5, 11, 55, 121, 605
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 217,770,642,605, is 1.
Now, the common factors can be found like this.
217:7x 31
770:2x 5x 7x 11
642:2x 3x 107
605:5x 11x 11
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 5x 7x 11 = 770
Therefore, the value for common factors is 770.
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 = 64899426900/(1x770)
LCM = 64899426900/770
LCM = 84284970
Thus, we can understand that the LCM of 217,770,642,605 is 84284970.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 217, 770, 642, 605
1. What is the LCM of 217, 770, 642, 605?
Answer: LCM of 217, 770, 642, 605 is 84284970.
2. How to calculate the LCM of 217, 770, 642, 605?
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 217, 770, 642, 605.
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}.