Least Common Multiple (LCM) of 21 and 194
The least common multiple (LCM) of 21 and 194 is 4074.
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 21 and 194?
First, calculate the GCD of 21 and 194 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 21 ÷ 194 = 0 remainder 21 |
| 2 | 194 ÷ 21 = 9 remainder 5 |
| 3 | 21 ÷ 5 = 4 remainder 1 |
| 4 | 5 ÷ 1 = 5 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 161 and 34 | 5474 |
| 147 and 139 | 20433 |
| 161 and 72 | 11592 |
| 166 and 31 | 5146 |
| 139 and 37 | 5143 |