Least Common Multiple (LCM) of 20 and 32
The least common multiple (LCM) of 20 and 32 is 160.
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 32?
First, calculate the GCD of 20 and 32 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 20 ÷ 32 = 0 remainder 20 |
| 2 | 32 ÷ 20 = 1 remainder 12 |
| 3 | 20 ÷ 12 = 1 remainder 8 |
| 4 | 12 ÷ 8 = 1 remainder 4 |
| 5 | 8 ÷ 4 = 2 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 28 and 21 | 84 |
| 69 and 70 | 4830 |
| 13 and 131 | 1703 |
| 147 and 159 | 7791 |
| 19 and 151 | 2869 |