LCM of 698, 638, 685, 705
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 698, 638, 685, 705 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 698, 638, 685, 705. So, keep reading to learn more.
Given numbers are 698,638,685,705
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 698,638,685,705 is 21505809270.
Find LCM of 698,638,685,705 with Prime Factorization
| 2 | 698, 638, 685, 705 |
| 5 | 349, 319, 685, 705 |
| 349, 319, 137, 141 |
Multiply the prime numbers at the bottom and the left side.
2 x 5 x 349 x 319 x 137 x 141 = 21505809270
Therefore, the lowest common multiple of 698,638,685,705 is 21505809270.
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.
698 x 638 x 685 x 705 = 215058092700
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.
698 : 1, 2, 349, 698
638 : 1, 2, 11, 22, 29, 58, 319, 638
685 : 1, 5, 137, 685
705 : 1, 3, 5, 15, 47, 141, 235, 705
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 698,638,685,705, is 1.
Now, the common factors can be found like this.
698:2x 349
638:2x 11x 29
685:5x 137
705:3x 5x 47
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 5 = 10
Therefore, the value for common factors is 10.
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 = 215058092700/(1x10)
LCM = 215058092700/10
LCM = 21505809270
Thus, we can understand that the LCM of 698,638,685,705 is 21505809270.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 698, 638, 685, 705
1. What is the LCM of 698, 638, 685, 705?
Answer: LCM of 698, 638, 685, 705 is 21505809270.
2. How to calculate the LCM of 698, 638, 685, 705?
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 698, 638, 685, 705.
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}.