LCM for 20 and 305

"Least Common Multiple" Calculator

Least Common Multiple of

and

What's the Least Common Multiple (LCM) of 20 and 305?

Answer

LCM of 20 and 305 is 1,220

(One thousand, two hundred twenty)

Finding LCM for 20 and 305 using GCF of these numbers

The first method to find LCM for numbers 20 and 305 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 20 and 305 is 5, so

LCM = (20 × 305) ÷ 5

LCM = 6100 ÷ 5

LCM = 1220

Finding LCM for 20 and 305 by Listing Multiples

The second method to find LCM for numbers 20 and 305 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, 1080, 1100, 1120, 1140, 1160, 1180, 1200, 1220, 1240, 1260

Multiples of 305: 305, 610, 915, 1220, 1525, 1830

So the LCM for 20 and 305 is 1220

Finding LCM for 20 and 305 by Prime Factorization

Another method to find LCM for numbers 20 and 305 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 305: 5, 61 (exponent form: 51, 611)

22 × 51 × 611 = 1220

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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 305? (The answer is: 1220). Select the first number (e.g. '20') and the second number (e.g. '305'). 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
5305305
63051830
73052135
83052440
93052745
10305610
113053355
123053660
133053965
143054270
15305915
163054880
173055185
183055490
193055795
203051220
213056405
223056710
233057015
243057320
253051525
263057930
273058235
283058540
293058845
303051830
313059455
323059760
3330510065
3430510370

FAQ

What's the Least Common Multiple (LCM) of 20 and 305?

LCM of 20 and 305 is 1,220

How to find the LCM of 20 and 305 using prime factorization?

To find the LCM of 20 and 305, find all prime factors of both numbers, then multiply the highest power of each prime factor. The result is 1,220.

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 305: LCM = 1,220, GCF = 5.

See Also