LCM for 15 and 80

What's the Least Common Multiple (LCM) of 15 and 80?

Answer: LCM of 15 and 80 is 240

(Two hundred forty)

Finding LCM for 15 and 80 using GCF's of these numbers

The first method to find LCM for numbers 15 and 80 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 15 and 80 is 5, so

LCM = (15 × 80) ÷ 5

LCM = 1200 ÷ 5

LCM = 240

Finding LCM for 15 and 80 by Listing Multiples

The second method to find LCM for numbers 15 and 80 is to list out the common multiples for both nubmers and pick the first which matching:

Multiples of 15: 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 255, 270

Multiples of 80: 80, 160, 240, 320, 400

So the LCM for 15 and 80 is 240

Finding LCM for 15 and 80 by Prime Factorization

Another method to find LCM for numbers 15 and 80 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:

All Prime Factors of 15: 3, 5 (exponent form: 31, 51)

All Prime Factors of 80: 2, 2, 2, 2, 5 (exponent form: 24, 51)

31 × 51 × 24 = 240

LCM Table

Number 1Number 2LCM
18080
28080
380240
48080
58080
680240
780560
88080
980720
108080
1180880
1280
13801040
1480560
1580240
1680
17801360
1880720
19801520
208080
21801680
2280880
23801840
2480
2580400
26801040
27802160
2880560
29802320
3080240

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 15 and 80? (The answer is: 240). Select the first number (e.g. '15') and the second number (e.g. '80'). 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

FAQ

What's the Least Common Multiple (LCM) of 15 and 80?

LCM of 15 and 80 is 240