Given numbers are 638,398,102,820

The least common multiple of numbers can be find using the prime factorization method or LCM formula.

The LCM of 638,398,102,820 is 2654775420.

Find LCM of 638,398,102,820 with Prime Factorization

Multiply the prime numbers at the bottom and the left side.

2 x 319 x 199 x 51 x 410 = 2654775420

Therefore, the lowest common multiple of 638,398,102,820 is 2654775420.

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.

638 x 398 x 102 x 820 = 21238203360

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.

638 : 1, 2, 11, 22, 29, 58, 319, 638

398 : 1, 2, 199, 398

102 : 1, 2, 3, 6, 17, 34, 51, 102

820 : 1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820

2 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 638,398,102,820, is 2.

Now, the common factors can be found like this.

638:2x 11x 29

398:2x 199

102:2x 3x 17

820:2x 2x 5x 41

From this, we can see that the common factors because they appear for more than two numbers. So, just multiply them all together.

2x 2 = 4

Therefore, the value for common factors is 4.

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 = 21238203360/(2x4)

LCM = 21238203360/8

LCM = 2654775420

Thus, we can understand that the LCM of 638,398,102,820 is 2654775420.

Here are some samples of LCM of two or more Numbers calculations.

• LCM of 197, 245, 970, 665
• LCM of 721, 443, 889, 979
• LCM of 584, 680, 813, 305
• LCM of 295, 447, 167, 838
• LCM of 172, 654, 704, 375

1. What is the LCM of 638, 398, 102, 820?

Answer: LCM of 638, 398, 102, 820 is 2654775420.

2. How to calculate the LCM of 638, 398, 102, 820?

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 638, 398, 102, 820.

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}.