LCM for 81 and 243
What's the Least Common Multiple (LCM) of 81 and 243?
(Two hundred forty-three)
Finding LCM for 81 and 243 using GCF's of these numbers
The first method to find LCM for numbers 81 and 243 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:
LCM = (Number1 × Number2) ÷ GCF
GCF of numbers 81 and 243 is 81, so
LCM = (81 × 243) ÷ 81
LCM = 19683 ÷ 81
LCM = 243
Finding LCM for 81 and 243 by Listing Multiples
The second method to find LCM for numbers 81 and 243 is to list out the common multiples for both nubmers and pick the first which matching:
Multiples of 81: 81, 162, 243, 324, 405
Multiples of 243: 243, 486, 729, 972, 1215, [...], 243
So the LCM for 81 and 243 is 243
Finding LCM for 81 and 243 by Prime Factorization
Another method to find LCM for numbers 81 and 243 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 243: 3, 3, 3, 3, 3 (exponent form: 35)
35 = 243
Related Calculations
See Also
- Greatest Common Factor - Find the Greatest Common Factor (GCF) of two numbers
<a href="https://calculat.io/en/number/least-common-multiple-lcm-of/81--243">What is the LCM of 81 and 243? - Calculatio</a>
LCM Table
| Number 1 | Number 2 | LCM |
|---|---|---|
| 66 | 243 | 5346 |
| 67 | 243 | 16281 |
| 68 | 243 | 16524 |
| 69 | 243 | 5589 |
| 70 | 243 | 17010 |
| 71 | 243 | 17253 |
| 72 | 243 | 1944 |
| 73 | 243 | 17739 |
| 74 | 243 | 17982 |
| 75 | 243 | 6075 |
| 76 | 243 | 18468 |
| 77 | 243 | 18711 |
| 78 | 243 | 6318 |
| 79 | 243 | 19197 |
| 80 | 243 | 19440 |
| 81 | 243 | 243 |
| 82 | 243 | 19926 |
| 83 | 243 | 20169 |
| 84 | 243 | 6804 |
| 85 | 243 | 20655 |
| 86 | 243 | 20898 |
| 87 | 243 | 7047 |
| 88 | 243 | 21384 |
| 89 | 243 | 21627 |
| 90 | 243 | 2430 |
| 91 | 243 | 22113 |
| 92 | 243 | 22356 |
| 93 | 243 | 7533 |
| 94 | 243 | 22842 |
| 95 | 243 | 23085 |
About "Least Common Multiple" Calculator
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