Least Common Multiple (LCM) of 197 and 81
The least common multiple (LCM) of 197 and 81 is 15957.
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 197 and 81?
First, calculate the GCD of 197 and 81 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 197 ÷ 81 = 2 remainder 35 |
| 2 | 81 ÷ 35 = 2 remainder 11 |
| 3 | 35 ÷ 11 = 3 remainder 2 |
| 4 | 11 ÷ 2 = 5 remainder 1 |
| 5 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 122 and 187 | 22814 |
| 141 and 29 | 4089 |
| 171 and 83 | 14193 |
| 160 and 75 | 2400 |
| 66 and 20 | 660 |