Least Common Multiple (LCM) of 171 and 121
The least common multiple (LCM) of 171 and 121 is 20691.
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 171 and 121?
First, calculate the GCD of 171 and 121 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 171 ÷ 121 = 1 remainder 50 |
| 2 | 121 ÷ 50 = 2 remainder 21 |
| 3 | 50 ÷ 21 = 2 remainder 8 |
| 4 | 21 ÷ 8 = 2 remainder 5 |
| 5 | 8 ÷ 5 = 1 remainder 3 |
| 6 | 5 ÷ 3 = 1 remainder 2 |
| 7 | 3 ÷ 2 = 1 remainder 1 |
| 8 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 178 and 153 | 27234 |
| 15 and 35 | 105 |
| 91 and 117 | 819 |
| 75 and 197 | 14775 |
| 65 and 156 | 780 |