Least Common Multiple (LCM) of 161 and 128
The least common multiple (LCM) of 161 and 128 is 20608.
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 161 and 128?
First, calculate the GCD of 161 and 128 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 161 ÷ 128 = 1 remainder 33 |
| 2 | 128 ÷ 33 = 3 remainder 29 |
| 3 | 33 ÷ 29 = 1 remainder 4 |
| 4 | 29 ÷ 4 = 7 remainder 1 |
| 5 | 4 ÷ 1 = 4 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 57 and 35 | 1995 |
| 131 and 73 | 9563 |
| 75 and 50 | 150 |
| 180 and 129 | 7740 |
| 18 and 115 | 2070 |