Least Common Multiple (LCM) of 138 and 123
The least common multiple (LCM) of 138 and 123 is 5658.
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 138 and 123?
First, calculate the GCD of 138 and 123 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 138 ÷ 123 = 1 remainder 15 |
| 2 | 123 ÷ 15 = 8 remainder 3 |
| 3 | 15 ÷ 3 = 5 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 151 and 109 | 16459 |
| 101 and 154 | 15554 |
| 140 and 180 | 1260 |
| 196 and 114 | 11172 |
| 20 and 28 | 140 |