LCM of 655, 621, 378, 690
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 655, 621, 378, 690 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 655, 621, 378, 690. So, keep reading to learn more.
Given numbers are 655,621,378,690
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 655,621,378,690 is 5694570.
Find LCM of 655,621,378,690 with Prime Factorization
| 2 | 655, 621, 378, 690 |
| 3 | 655, 621, 189, 345 |
| 3 | 655, 207, 63, 115 |
| 3 | 655, 69, 21, 115 |
| 5 | 655, 23, 7, 115 |
| 23 | 131, 23, 7, 23 |
| 131, 1, 7, 1 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 3 x 3 x 5 x 23 x 131 x 1 x 7 x 1 = 5694570
Therefore, the lowest common multiple of 655,621,378,690 is 5694570.
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.
655 x 621 x 378 x 690 = 106089839100
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.
655 : 1, 5, 131, 655
621 : 1, 3, 9, 23, 27, 69, 207, 621
378 : 1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 189, 378
690 : 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 655,621,378,690, is 1.
Now, the common factors can be found like this.
655:5x 131
621:3x 3x 3x 23
378:2x 3x 3x 3x 7
690:2x 3x 5x 23
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 3x 3x 3x 5x 23 = 18630
Therefore, the value for common factors is 18630.
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 = 106089839100/(1x18630)
LCM = 106089839100/18630
LCM = 5694570
Thus, we can understand that the LCM of 655,621,378,690 is 5694570.
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FAQs on LCM of 655, 621, 378, 690
1. What is the LCM of 655, 621, 378, 690?
Answer: LCM of 655, 621, 378, 690 is 5694570.
2. How to calculate the LCM of 655, 621, 378, 690?
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 655, 621, 378, 690.
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}.