Least Common Multiple (LCM) of 71 and 180
The least common multiple (LCM) of 71 and 180 is 12780.
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 71 and 180?
First, calculate the GCD of 71 and 180 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 71 ÷ 180 = 0 remainder 71 |
| 2 | 180 ÷ 71 = 2 remainder 38 |
| 3 | 71 ÷ 38 = 1 remainder 33 |
| 4 | 38 ÷ 33 = 1 remainder 5 |
| 5 | 33 ÷ 5 = 6 remainder 3 |
| 6 | 5 ÷ 3 = 1 remainder 2 |
| 7 | 3 ÷ 2 = 1 remainder 1 |
| 8 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 79 and 128 | 10112 |
| 57 and 177 | 3363 |
| 121 and 132 | 1452 |
| 128 and 56 | 896 |
| 50 and 161 | 8050 |