Least Common Multiple (LCM) of 20 and 122
The least common multiple (LCM) of 20 and 122 is 1220.
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 122?
First, calculate the GCD of 20 and 122 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 20 ÷ 122 = 0 remainder 20 |
| 2 | 122 ÷ 20 = 6 remainder 2 |
| 3 | 20 ÷ 2 = 10 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 109 and 156 | 17004 |
| 143 and 161 | 23023 |
| 82 and 199 | 16318 |
| 159 and 120 | 6360 |
| 114 and 40 | 2280 |