Least Common Multiple  of 19 and 28 is 532

How to find the Least Common Multiple of 19 and 28?

On this page below, we'll use the Prime Factorisation, and the List of Multiples method to find out the LCM of 19 and 28.

Follow the steps below, and let's calculate the LCM of 19 and 28.


Method 1 - Prime factorization

Step 1: Create a list of all the prime factors of the numbers 19 and 28:

Prime factors of 19

The prime factors of 19 are 19. Prime factorization of 19 in exponential form is:

19 = 191

Prime factors of 28

The prime factors of 28 are 2, 2 and 7. Prime factorization of 28 in exponential form is:

28 = 22x71


Step 2: Identify the highest power of each prime number from the above boxes:

191, 22, 71


Step 3: Multiply these values together:

191x22x71=532


Step 4: The result:

As seen on the calculation above, we have now obtained the LCM of 19 and 28.

The Least Common Multiple of 19 and 28 is 532.


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 19:

19, 38, 57, 76, 95, 114, 133, 152, 171, 190, 209, 228, 247, 266, 285, 304, 323, 342, 361, 380, 399, 418, 437, 456, 475, 494, 513, 532, 551, 570, 589

Multiples of 28:

28, 56, 84, 112, 140, 168, 196, 224, 252, 280, 308, 336, 364, 392, 420, 448, 476, 504, 532, 560, 588, 616


Therefore,

LCM(19, 28) = 532