Least Common Multiple (LCM) of 81 and 193
The least common multiple (LCM) of 81 and 193 is 15633.
What is the Least Common Multiple (LCM)?
The LCM of two integers is the smallest positive integer that is divisible by both numbers. It is often used to find common denominators and solve problems involving periodic events.
Formula for LCM
The LCM of two numbers can be calculated using their GCD:
LCM(a, b) = |a × b| ÷ GCD(a, b)
How to Calculate the LCM of 81 and 193?
First, calculate the GCD of 81 and 193 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 193 = 0 remainder 81 |
| 2 | 193 ÷ 81 = 2 remainder 31 |
| 3 | 81 ÷ 31 = 2 remainder 19 |
| 4 | 31 ÷ 19 = 1 remainder 12 |
| 5 | 19 ÷ 12 = 1 remainder 7 |
| 6 | 12 ÷ 7 = 1 remainder 5 |
| 7 | 7 ÷ 5 = 1 remainder 2 |
| 8 | 5 ÷ 2 = 2 remainder 1 |
| 9 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 196 and 165 | 32340 |
| 63 and 34 | 2142 |
| 101 and 69 | 6969 |
| 26 and 13 | 26 |
| 149 and 177 | 26373 |