Least Common Multiple (LCM) of 121 and 173
The least common multiple (LCM) of 121 and 173 is 20933.
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 121 and 173?
First, calculate the GCD of 121 and 173 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 121 ÷ 173 = 0 remainder 121 |
| 2 | 173 ÷ 121 = 1 remainder 52 |
| 3 | 121 ÷ 52 = 2 remainder 17 |
| 4 | 52 ÷ 17 = 3 remainder 1 |
| 5 | 17 ÷ 1 = 17 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 128 and 169 | 21632 |
| 189 and 55 | 10395 |
| 133 and 138 | 18354 |
| 89 and 147 | 13083 |
| 86 and 176 | 7568 |