LCM of 697, 840, 561, 398
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 697, 840, 561, 398 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 697, 840, 561, 398. So, keep reading to learn more.
Given numbers are 697,840,561,398
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 697,840,561,398 is 1281615720.
Find LCM of 697,840,561,398 with Prime Factorization
| 2 | 697, 840, 561, 398 |
| 3 | 697, 420, 561, 199 |
| 17 | 697, 140, 187, 199 |
| 41, 140, 11, 199 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 17 x 41 x 140 x 11 x 199 = 1281615720
Therefore, the lowest common multiple of 697,840,561,398 is 1281615720.
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.
697 x 840 x 561 x 398 = 130724803440
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.
697 : 1, 17, 41, 697
840 : 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 20, 21, 24, 28, 30, 35, 40, 42, 56, 60, 70, 84, 105, 120, 140, 168, 210, 280, 420, 840
561 : 1, 3, 11, 17, 33, 51, 187, 561
398 : 1, 2, 199, 398
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 697,840,561,398, is 1.
Now, the common factors can be found like this.
697:17x 41
840:2x 2x 2x 3x 5x 7
561:3x 11x 17
398:2x 199
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 17 = 102
Therefore, the value for common factors is 102.
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 = 130724803440/(1x102)
LCM = 130724803440/102
LCM = 1281615720
Thus, we can understand that the LCM of 697,840,561,398 is 1281615720.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 697, 840, 561, 398
1. What is the LCM of 697, 840, 561, 398?
Answer: LCM of 697, 840, 561, 398 is 1281615720.
2. How to calculate the LCM of 697, 840, 561, 398?
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 697, 840, 561, 398.
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}.