LCM for 1 and 20

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What's the Least Common Multiple (LCM) of 1 and 20?

Answer

LCM of 1 and 20 is
20

First common multiples: 20, 40, 60, …

1 divides every number: the GCF with 1 is always 1, and the LCM is the other number itself — here 20.

1 — no prime factors

20 = 22 × 5

Prime120Highest power
2—2222
5—55

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

LCM = 22 × 5 = 20

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LCM Table

Number 1Number 2LCM
111
133
144
155
166
177
188
199
11010
11212
11313
11616
12020
12727
15656
1100100

FAQ

What's the Least Common Multiple (LCM) of 1 and 20?

LCM of 1 and 20 is 20

How to find the LCM of 1 and 20 using prime factorization?

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

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 1 and 20: LCM = 20, GCF = 1.

See Also