Least Common Multiple (LCM) of 74 and 128
The least common multiple (LCM) of 74 and 128 is 4736.
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 74 and 128?
First, calculate the GCD of 74 and 128 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 74 ÷ 128 = 0 remainder 74 |
| 2 | 128 ÷ 74 = 1 remainder 54 |
| 3 | 74 ÷ 54 = 1 remainder 20 |
| 4 | 54 ÷ 20 = 2 remainder 14 |
| 5 | 20 ÷ 14 = 1 remainder 6 |
| 6 | 14 ÷ 6 = 2 remainder 2 |
| 7 | 6 ÷ 2 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 53 and 40 | 2120 |
| 158 and 71 | 11218 |
| 109 and 54 | 5886 |
| 39 and 120 | 1560 |
| 190 and 19 | 190 |