LCM for 20 and 445

"Least Common Multiple" Calculator

Least Common Multiple of

and

What's the Least Common Multiple (LCM) of 20 and 445?

Answer

LCM of 20 and 445 is 1,780

(One thousand, seven hundred eighty)

Finding LCM for 20 and 445 using GCF of these numbers

The first method to find LCM for numbers 20 and 445 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 20 and 445 is 5, so

LCM = (20 × 445) ÷ 5

LCM = 8900 ÷ 5

LCM = 1780

Finding LCM for 20 and 445 by Listing Multiples

The second method to find LCM for numbers 20 and 445 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, 1280, 1300, 1320, 1340, 1360, 1380, 1400, 1420, 1440, 1460, 1480, 1500, 1520, 1540, 1560, 1580, 1600, 1620, 1640, 1660, 1680, 1700, 1720, 1740, 1760, 1780, 1800, 1820

Multiples of 445: 445, 890, 1335, 1780, 2225, 2670

So the LCM for 20 and 445 is 1780

Finding LCM for 20 and 445 by Prime Factorization

Another method to find LCM for numbers 20 and 445 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 445: 5, 89 (exponent form: 51, 891)

22 × 51 × 891 = 1780

See Also

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 445? (The answer is: 1780). Select the first number (e.g. '20') and the second number (e.g. '445'). 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
5445445
64452670
74453115
84453560
94454005
10445890
114454895
124455340
134455785
144456230
154451335
164457120
174457565
184458010
194458455
204451780
214459345
224459790
2344510235
2444510680
254452225
2644511570
2744512015
2844512460
2944512905
304452670
3144513795
3244514240
3344514685
3444515130

FAQ

What's the Least Common Multiple (LCM) of 20 and 445?

LCM of 20 and 445 is 1,780

How to find the LCM of 20 and 445 using prime factorization?

To find the LCM of 20 and 445, find all prime factors of both numbers, then multiply the highest power of each prime factor. The result is 1,780.

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 445: LCM = 1,780, GCF = 5.

See Also