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
20160160
20165660
20170340
20175700
20190380
20210420
20220220
20225900
20230460
202551020
202751100
202851140
20290580
202951180
203051220
203251300
203351340
203551420
20400400
20410820
204151660
20430860
204351740
20440440
204451780
204651860
20470940
20480480
20490980
20500500

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