Least Common Multiple (LCM) of 57 and 31
The least common multiple (LCM) of 57 and 31 is 1767.
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 57 and 31?
First, calculate the GCD of 57 and 31 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 57 ÷ 31 = 1 remainder 26 |
| 2 | 31 ÷ 26 = 1 remainder 5 |
| 3 | 26 ÷ 5 = 5 remainder 1 |
| 4 | 5 ÷ 1 = 5 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 17 and 81 | 1377 |
| 158 and 140 | 11060 |
| 171 and 70 | 11970 |
| 143 and 98 | 14014 |
| 186 and 45 | 2790 |