Least Common Multiple (LCM) of 87 and 172
The least common multiple (LCM) of 87 and 172 is 14964.
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 172?
First, calculate the GCD of 87 and 172 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 87 ÷ 172 = 0 remainder 87 |
| 2 | 172 ÷ 87 = 1 remainder 85 |
| 3 | 87 ÷ 85 = 1 remainder 2 |
| 4 | 85 ÷ 2 = 42 remainder 1 |
| 5 | 2 ÷ 1 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 148 and 139 | 20572 |
| 45 and 184 | 8280 |
| 19 and 129 | 2451 |
| 40 and 144 | 720 |
| 22 and 72 | 792 |