LCM for 81 and 99

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What's the Least Common Multiple (LCM) of 81 and 99?

Answer

LCM of 81 and 99 is
891

(Eight hundred ninety-one)

Finding LCM for 81 and 99 using GCF of these numbers

The first method to find LCM for numbers 81 and 99 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 81 and 99 is 9, so

LCM = (81 × 99) ÷ 9

LCM = 8,019 ÷ 9

LCM = 891

Finding LCM for 81 and 99 by Listing Multiples

The second method to find LCM for numbers 81 and 99 is to list out the common multiples for both numbers and pick the first one that matches:

Multiples of 81: 81, 162, 243, 324, 405, 486, 567, 648, 729, 810, 891, 972, 1053

Multiples of 99: 99, 198, 297, 396, 495, 594, 693, 792, 891, 990, 1089

So the LCM for 81 and 99 is 891

Finding LCM for 81 and 99 by Prime Factorization

Another method to find LCM for numbers 81 and 99 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors:

All Prime Factors of 81: 3, 3, 3, 3 (exponent form: 34)

All Prime Factors of 99: 3, 3, 11 (exponent form: 32, 111)

34 × 111 = 891

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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 81 and 99? (The answer is: 891). Select the first number (e.g. '81') and the second number (e.g. '99'). 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
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LCM Table

Number 1Number 2LCM
81842,268
81856,885
81866,966
81872,349
81887,128
81897,209
8190810
81917,371
81927,452
81932,511
81947,614
81957,695
81962,592
81977,857
81987,938
8199891
811008,100
811018,181
811022,754
811038,343
811048,424
811052,835
811068,586
811078,667
81108324
811098,829
811108,910
811112,997
811129,072
811139,153

FAQ

What's the Least Common Multiple (LCM) of 81 and 99?

LCM of 81 and 99 is 891

How to find the LCM of 81 and 99 using prime factorization?

To find the LCM of 81 and 99, find all prime factors of both numbers, then multiply the highest power of each prime factor. The result is 891.

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 81 and 99: LCM = 891, GCF = 9.

See Also