LCM of 628, 689, 949, 990
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 628, 689, 949, 990 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 628, 689, 949, 990. So, keep reading to learn more.
Given numbers are 628,689,949,990
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 628,689,949,990 is 15635325420.
Find LCM of 628,689,949,990 with Prime Factorization
| 2 | 628, 689, 949, 990 |
| 13 | 314, 689, 949, 495 |
| 314, 53, 73, 495 |
Multiply the prime numbers at the bottom and the left side.
2 x 13 x 314 x 53 x 73 x 495 = 15635325420
Therefore, the lowest common multiple of 628,689,949,990 is 15635325420.
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.
628 x 689 x 949 x 990 = 406518460920
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.
628 : 1, 2, 4, 157, 314, 628
689 : 1, 13, 53, 689
949 : 1, 13, 73, 949
990 : 1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 990
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 628,689,949,990, is 1.
Now, the common factors can be found like this.
628:2x 2x 157
689:13x 53
949:13x 73
990:2x 3x 3x 5x 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 13 = 26
Therefore, the value for common factors is 26.
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 = 406518460920/(1x26)
LCM = 406518460920/26
LCM = 15635325420
Thus, we can understand that the LCM of 628,689,949,990 is 15635325420.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 628, 689, 949, 990
1. What is the LCM of 628, 689, 949, 990?
Answer: LCM of 628, 689, 949, 990 is 15635325420.
2. How to calculate the LCM of 628, 689, 949, 990?
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 628, 689, 949, 990.
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}.