Least Common Multiple (LCM) of 20 and 161
The least common multiple (LCM) of 20 and 161 is 3220.
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 20 and 161?
First, calculate the GCD of 20 and 161 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 20 ÷ 161 = 0 remainder 20 |
| 2 | 161 ÷ 20 = 8 remainder 1 |
| 3 | 20 ÷ 1 = 20 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 115 and 46 | 230 |
| 38 and 176 | 3344 |
| 42 and 139 | 5838 |
| 104 and 125 | 13000 |
| 146 and 48 | 3504 |