LCM of 782, 690, 890, 921
Reviewed By : Rajashekhar Valipishetty
Last Updated at : Mar 29,2023
Find the LCM of 782, 690, 890, 921 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 782, 690, 890, 921. So, keep reading to learn more.
Given numbers are 782,690,890,921
The least common multiple of numbers can be find using the prime factorization method or LCM formula.
The LCM of 782,690,890,921 is 320498790.
Find LCM of 782,690,890,921 with Prime Factorization
| 2 | 782, 690, 890, 921 |
| 3 | 391, 345, 445, 921 |
| 5 | 391, 115, 445, 307 |
| 23 | 391, 23, 89, 307 |
| 17, 1, 89, 307 |
Multiply the prime numbers at the bottom and the left side.
2 x 3 x 5 x 23 x 17 x 1 x 89 x 307 = 320498790
Therefore, the lowest common multiple of 782,690,890,921 is 320498790.
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.
782 x 690 x 890 x 921 = 442288330200
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.
782 : 1, 2, 17, 23, 34, 46, 391, 782
690 : 1, 2, 3, 5, 6, 10, 15, 23, 30, 46, 69, 115, 138, 230, 345, 690
890 : 1, 2, 5, 10, 89, 178, 445, 890
921 : 1, 3, 307, 921
1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 782,690,890,921, is 1.
Now, the common factors can be found like this.
782:2x 17x 23
690:2x 3x 5x 23
890:2x 5x 89
921:3x 307
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 5x 23 = 1380
Therefore, the value for common factors is 1380.
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 = 442288330200/(1x1380)
LCM = 442288330200/1380
LCM = 320498790
Thus, we can understand that the LCM of 782,690,890,921 is 320498790.
LCM of two or more Numbers Calculation Examples
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FAQs on LCM of 782, 690, 890, 921
1. What is the LCM of 782, 690, 890, 921?
Answer: LCM of 782, 690, 890, 921 is 320498790.
2. How to calculate the LCM of 782, 690, 890, 921?
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 782, 690, 890, 921.
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}.