LCM for 20 and 145

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What's the Least Common Multiple (LCM) of 20 and 145?

Answer

LCM of 20 and 145 is
580

First common multiples: 580; 1,160; 1,740; …

580 is divisible by both: 580 ÷ 20 = 29, 580 ÷ 145 = 4 — and 29 and 4 share no factor but 1, so no smaller number is. As a common denominator: multiply the top and bottom of x/20 by 29 and of y/145 by 4.

20 = 22 × 5

145 = 5 × 29

Prime20145Highest power
222—22
5555
29—2929

— = power 0: the prime is not a factor of this number; the LCM takes it from the number that has it.

LCM = 22 × 5 × 29 = 580

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LCM Table

Number 1Number 2LCM
20511,020
20531,060
2054540
2055220
2058580
206060
2070140
2075300
2084420
2090180
20100100
20105420
20125500
20135540
20140140
20145580
20150300
20160160
20165660
20170340
20175700
20185740
20190380
20210420
20220220
20225900
20230460
202551,020
202751,100
202851,140

FAQ

What's the Least Common Multiple (LCM) of 20 and 145?

LCM of 20 and 145 is 580

How to find the LCM of 20 and 145 using prime factorization?

To find the LCM of 20 and 145, find all prime factors of both numbers, then multiply the highest power of each prime factor. The result is 580.

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 145: LCM = 580, GCF = 5.

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