LCM for 20 and 255

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Least Common Multiple of

and

What's the Least Common Multiple (LCM) of 20 and 255?

Answer

LCM of 20 and 255 is 1,020

(One thousand, twenty)

Finding LCM for 20 and 255 using GCF of these numbers

The first method to find LCM for numbers 20 and 255 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 20 and 255 is 5, so

LCM = (20 × 255) ÷ 5

LCM = 5100 ÷ 5

LCM = 1020

Finding LCM for 20 and 255 by Listing Multiples

The second method to find LCM for numbers 20 and 255 is to list out the common multiples for both numbers and pick the first one that matches:

Multiples of 20: 20, 40, 60, 80, 100, 120, 140, 160, 180, 200, 220, 240, 260, 280, 300, 320, 340, 360, 380, 400, 420, 440, 460, 480, 500, 520, 540, 560, 580, 600, 620, 640, 660, 680, 700, 720, 740, 760, 780, 800, 820, 840, 860, 880, 900, 920, 940, 960, 980, 1000, 1020, 1040, 1060

Multiples of 255: 255, 510, 765, 1020, 1275, 1530

So the LCM for 20 and 255 is 1020

Finding LCM for 20 and 255 by Prime Factorization

Another method to find LCM for numbers 20 and 255 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:

All Prime Factors of 20: 2, 2, 5 (exponent form: 22, 51)

All Prime Factors of 255: 3, 5, 17 (exponent form: 31, 51, 171)

22 × 51 × 31 × 171 = 1020

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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 20 and 255? (The answer is: 1020). Select the first number (e.g. '20') and the second number (e.g. '255'). 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
5255255
6255510
72551785
82552040
9255765
10255510
112552805
122551020
132553315
142553570
15255255
162554080
17255255
182551530
192554845
202551020
212551785
222555610
232555865
242552040
252551275
262556630
272552295
282557140
292557395
30255510
312557905
322558160
332552805
34255510

FAQ

What's the Least Common Multiple (LCM) of 20 and 255?

LCM of 20 and 255 is 1,020

How to find the LCM of 20 and 255 using prime factorization?

To find the LCM of 20 and 255, find all prime factors of both numbers, then multiply the highest power of each prime factor. The result is 1,020.

What is the difference between LCM and GCF?

LCM (Least Common Multiple) is the smallest number divisible by both numbers, while GCF (Greatest Common Factor) is the largest number that divides both. For 20 and 255: LCM = 1,020, GCF = 5.

See Also