Least Common Multiple (LCM) of 138 and 47
The least common multiple (LCM) of 138 and 47 is 6486.
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 47?
First, calculate the GCD of 138 and 47 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 138 ÷ 47 = 2 remainder 44 |
| 2 | 47 ÷ 44 = 1 remainder 3 |
| 3 | 44 ÷ 3 = 14 remainder 2 |
| 4 | 3 ÷ 2 = 1 remainder 1 |
| 5 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 191 and 180 | 34380 |
| 83 and 128 | 10624 |
| 78 and 153 | 3978 |
| 177 and 143 | 25311 |
| 131 and 155 | 20305 |