LCM for 18 and 28

"Least Common Multiple" Calculator

Least Common Multiple of

and

What's the Least Common Multiple (LCM) of 18 and 28?

Answer: LCM of 18 and 28 is 252

(Two hundred fifty-two)

Finding LCM for 18 and 28 using GCF's of these numbers

The first method to find LCM for numbers 18 and 28 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 18 and 28 is 2, so

LCM = (18 × 28) ÷ 2

LCM = 504 ÷ 2

LCM = 252

Finding LCM for 18 and 28 by Listing Multiples

The second method to find LCM for numbers 18 and 28 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 18: 18, 36, 54, 72, 90, 108, 126, 144, 162, 180, 198, 216, 234, 252, 270, 288

Multiples of 28: 28, 56, 84, 112, 140, 168, 196, 224, 252, 280, 308

So the LCM for 18 and 28 is 252

Finding LCM for 18 and 28 by Prime Factorization

Another method to find LCM for numbers 18 and 28 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:

All Prime Factors of 18: 2, 3, 3 (exponent form: 21, 32)

All Prime Factors of 28: 2, 2, 7 (exponent form: 22, 71)

22 × 32 × 71 = 252

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About "Least Common Multiple" Calculator

This calculator will help you find the Least Common Multiple (LCM) of two numbers. For example, it can help you find out what's the Least Common Multiple (LCM) of 18 and 28? (The answer is: 252). Select the first number (e.g. '18') and the second number (e.g. '28'). After that hit the 'Calculate' button.
Least Common Multiple (LCM) also known as the Lowest Common Multiple or Smallest Common Multiple of 2 numbers - it is the smallest positive integer that is divisible by both numbers

"Least Common Multiple" Calculator

Least Common Multiple of

and

LCM Table

Number 1Number 2LCM
32884
42828
528140
62884
72828
82856
928252
1028140
1128308
122884
1328364
142828
1528420
1628112
1728476
1828252
1928532
2028140
212884
2228308
2328644
2428168
2528700
2628364
2728756
282828
2928812
3028420
3128868
3228224

FAQ

What's the Least Common Multiple (LCM) of 18 and 28?

LCM of 18 and 28 is 252

See Also