 ## How to find the Least Common Multiple of 15 and 22?

On this page below, we'll use the Prime Factorisation, and the List of Multiples method to find out the LCM of 15 and 22.

Follow the steps below, and let's calculate the LCM of 15 and 22.

### Method 1 - Prime factorization

#### Step 1: Create a list of all the prime factors of the numbers 15 and 22:

##### Prime factors of 15

The prime factors of 15 are 3 and 5. Prime factorization of 15 in exponential form is:

15 = 31x51

##### Prime factors of 22

The prime factors of 22 are 2 and 11. Prime factorization of 22 in exponential form is:

22 = 21x111

31, 51, 21, 111

31x51x21x111=330

#### Step 4: The result:

As seen on the calculation above, we have now obtained the LCM of 15 and 22.

The Least Common Multiple of 15 and 22 is 330.

### Method 2 - List of Multiples

Find and list multiples of each number until the first common multiple is found. This is the lowest common multiple.

#### Multiples of 15:

15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 255, 270, 285, 300, 315, 330, 345, 360, 375

#### Multiples of 22:

22, 44, 66, 88, 110, 132, 154, 176, 198, 220, 242, 264, 286, 308, 330, 352, 374, 396

#### Therefore,

LCM(15, 22) = 330