Least Common Multiple (LCM) of 128 and 61
The least common multiple (LCM) of 128 and 61 is 7808.
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 128 and 61?
First, calculate the GCD of 128 and 61 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 128 ÷ 61 = 2 remainder 6 |
| 2 | 61 ÷ 6 = 10 remainder 1 |
| 3 | 6 ÷ 1 = 6 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 86 and 137 | 11782 |
| 60 and 107 | 6420 |
| 17 and 72 | 1224 |
| 180 and 20 | 180 |
| 143 and 57 | 8151 |