Given numbers are 639,401,401,421

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

The LCM of 639,401,401,421 is 107876619.

Find LCM of 639,401,401,421 with Prime Factorization

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

401 x 639 x 1 x 1 x 421 = 107876619

Therefore, the lowest common multiple of 639,401,401,421 is 107876619.

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.

639 x 401 x 401 x 421 = 43258524219

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.

639 : 1, 3, 9, 71, 213, 639

401 : 1, 401

401 : 1, 401

421 : 1, 421

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 639,401,401,421, is 1.

Now, the common factors can be found like this.

639:3x 3x 71

401:401

401:401

421:421

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

401 = 401

Therefore, the value for common factors is 401.

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 = 43258524219/(1x401)

LCM = 43258524219/401

LCM = 107876619

Thus, we can understand that the LCM of 639,401,401,421 is 107876619.

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

• LCM of 757, 581, 698, 802
• LCM of 950, 954, 589, 150
• LCM of 212, 991, 404, 732
• LCM of 417, 151, 723, 274
• LCM of 307, 976, 139, 222

1. What is the LCM of 639, 401, 401, 421?

Answer: LCM of 639, 401, 401, 421 is 107876619.

2. How to calculate the LCM of 639, 401, 401, 421?

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 639, 401, 401, 421.

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}.