Least Common Multiple (LCM) of 87 and 31
The least common multiple (LCM) of 87 and 31 is 2697.
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 87 and 31?
First, calculate the GCD of 87 and 31 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 87 ÷ 31 = 2 remainder 25 |
| 2 | 31 ÷ 25 = 1 remainder 6 |
| 3 | 25 ÷ 6 = 4 remainder 1 |
| 4 | 6 ÷ 1 = 6 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 153 and 155 | 23715 |
| 173 and 155 | 26815 |
| 58 and 103 | 5974 |
| 158 and 28 | 2212 |
| 111 and 155 | 17205 |