Least Common Multiple (LCM) of 87 and 123
The least common multiple (LCM) of 87 and 123 is 3567.
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 123?
First, calculate the GCD of 87 and 123 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 87 ÷ 123 = 0 remainder 87 |
| 2 | 123 ÷ 87 = 1 remainder 36 |
| 3 | 87 ÷ 36 = 2 remainder 15 |
| 4 | 36 ÷ 15 = 2 remainder 6 |
| 5 | 15 ÷ 6 = 2 remainder 3 |
| 6 | 6 ÷ 3 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 20 and 128 | 640 |
| 165 and 52 | 8580 |
| 176 and 147 | 25872 |
| 81 and 114 | 3078 |
| 188 and 143 | 26884 |