Given numbers are 721,138,170,661

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

The LCM of 721,138,170,661 is 5590295130.

Find LCM of 721,138,170,661 with Prime Factorization

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

2 x 721 x 69 x 85 x 661 = 5590295130

Therefore, the lowest common multiple of 721,138,170,661 is 5590295130.

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.

721 x 138 x 170 x 661 = 11180590260

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.

721 : 1, 7, 103, 721

138 : 1, 2, 3, 6, 23, 46, 69, 138

170 : 1, 2, 5, 10, 17, 34, 85, 170

661 : 1, 661

1 is the greatest number that appears in all the lists. Therefore, we can determine that the GCF of 721,138,170,661, is 1.

Now, the common factors can be found like this.

721:7x 103

138:2x 3x 23

170:2x 5x 17

661:661

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

2 = 2

Therefore, the value for common factors is 2.

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 = 11180590260/(1x2)

LCM = 11180590260/2

LCM = 5590295130

Thus, we can understand that the LCM of 721,138,170,661 is 5590295130.

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

• LCM of 148, 603, 784, 828
• LCM of 966, 588, 717, 200
• LCM of 902, 363, 179, 852
• LCM of 135, 488, 495, 651
• LCM of 782, 750, 824, 549

1. What is the LCM of 721, 138, 170, 661?

Answer: LCM of 721, 138, 170, 661 is 5590295130.

2. How to calculate the LCM of 721, 138, 170, 661?

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 721, 138, 170, 661.

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}.