Least Common Multiple (LCM) of 20 and 79
The least common multiple (LCM) of 20 and 79 is 1580.
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 79?
First, calculate the GCD of 20 and 79 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 20 ÷ 79 = 0 remainder 20 |
| 2 | 79 ÷ 20 = 3 remainder 19 |
| 3 | 20 ÷ 19 = 1 remainder 1 |
| 4 | 19 ÷ 1 = 19 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 46 and 142 | 3266 |
| 145 and 117 | 16965 |
| 60 and 111 | 2220 |
| 79 and 20 | 1580 |
| 95 and 84 | 7980 |