LCM of 628, 690, 402, 870
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 628, 690, 402, 870 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, 690, 402, 870. So, keep reading to learn more.
Given numbers are 628,690,402,870
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 628,690,402,870 is 420970380.
Find LCM of 628,690,402,870 with Prime Factorization
| 2 | 628, 690, 402, 870 |
| 3 | 314, 345, 201, 435 |
| 5 | 314, 115, 67, 145 |
| 314, 23, 67, 29 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 314 x 23 x 67 x 29 = 420970380
Therefore, the lowest common multiple of 628,690,402,870 is 420970380.
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 690 x 402 x 870 = 151549336800
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
690 : 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690
402 : 1, 2, 3, 6, 67, 134, 201, 402
870 : 1, 2, 3, 5, 6, 10, 15, 29, 30, 58, 87, 145, 174, 290, 435, 870
2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 628,690,402,870, is 2.
Now, the common factors can be found like this.
628:2x 2x 157
690:2x 3x 5x 23
402:2x 3x 67
870:2x 3x 5x 29
From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.
2x 2x 3x 3x 5 = 180
Therefore, the value for common factors is 180.
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 = 151549336800/(2x180)
LCM = 151549336800/360
LCM = 420970380
Thus, we can understand that the LCM of 628,690,402,870 is 420970380.
LCM of two or more Numbers Calculation Examples
Here are some samples of LCM of two or more Numbers calculations.
FAQs on LCM of 628, 690, 402, 870
1. What is the LCM of 628, 690, 402, 870?
Answer: LCM of 628, 690, 402, 870 is 420970380.
2. How to calculate the LCM of 628, 690, 402, 870?
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, 690, 402, 870.
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}.