Least Common Multiple (LCM) of 161 and 20
The least common multiple (LCM) of 161 and 20 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 161 and 20?
First, calculate the GCD of 161 and 20 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 161 ÷ 20 = 8 remainder 1 |
| 2 | 20 ÷ 1 = 20 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 190 and 121 | 22990 |
| 69 and 78 | 1794 |
| 117 and 158 | 18486 |
| 20 and 129 | 2580 |
| 17 and 173 | 2941 |