Least Common Multiple (LCM) of 20 and 170
The least common multiple (LCM) of 20 and 170 is 340.
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 20 and 170?
First, calculate the GCD of 20 and 170 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 20 ÷ 170 = 0 remainder 20 |
| 2 | 170 ÷ 20 = 8 remainder 10 |
| 3 | 20 ÷ 10 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 170 and 27 | 4590 |
| 105 and 137 | 14385 |
| 45 and 155 | 1395 |
| 154 and 134 | 10318 |
| 140 and 115 | 3220 |