LCM for 16 and 81

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What's the Least Common Multiple (LCM) of 16 and 81?

Answer

LCM of 16 and 81 is
1,296

First common multiples: 1,296; 2,592; 3,888; …

1,296 is divisible by both: 1,296 ÷ 16 = 81; 1,296 ÷ 81 = 16 — and 81 and 16 share no factor but 1, so no smaller number is. As a common denominator: multiply the top and bottom of x/16 by 81 and of y/81 by 16.

16 and 81 are coprime (GCF = 1), so their LCM is simply the product: 16 × 81 = 1,296.

16 = 24

81 = 34

Prime1681Highest power
224—24
3—3434

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

LCM = 24 × 34 = 1,296

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LCM Table

Number 1Number 2LCM
1634272
1635560
1636144
1638304
1639624
164080
1642336
1643688
1644176
1645720
1646368
164848
1651816
1655880
1656112
1657912
1658464
1659944
166464
1672144
168080
16811,296
1684336
1690720
169696
16100400
16112112
16120240
161211,936
16128128

FAQ

What's the Least Common Multiple (LCM) of 16 and 81?

LCM of 16 and 81 is 1,296

How to find the LCM of 16 and 81 using prime factorization?

To find the LCM of 16 and 81, find all prime factors of both numbers, then multiply the highest power of each prime factor. The result is 1,296.

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 16 and 81: LCM = 1,296, GCF = 1.

See Also