Least Common Multiple (LCM) of 81 and 173
The least common multiple (LCM) of 81 and 173 is 14013.
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 173?
First, calculate the GCD of 81 and 173 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 81 ÷ 173 = 0 remainder 81 |
| 2 | 173 ÷ 81 = 2 remainder 11 |
| 3 | 81 ÷ 11 = 7 remainder 4 |
| 4 | 11 ÷ 4 = 2 remainder 3 |
| 5 | 4 ÷ 3 = 1 remainder 1 |
| 6 | 3 ÷ 1 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 121 and 145 | 17545 |
| 167 and 161 | 26887 |
| 83 and 155 | 12865 |
| 197 and 118 | 23246 |
| 189 and 162 | 1134 |