Least Common Multiple (LCM) of 47 and 170
The least common multiple (LCM) of 47 and 170 is 7990.
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 47 and 170?
First, calculate the GCD of 47 and 170 using the Euclidean algorithm. Then use the formula above to find the LCM.
Step-by-Step GCD Calculation
| Step | Calculation |
|---|---|
| 1 | 47 ÷ 170 = 0 remainder 47 |
| 2 | 170 ÷ 47 = 3 remainder 29 |
| 3 | 47 ÷ 29 = 1 remainder 18 |
| 4 | 29 ÷ 18 = 1 remainder 11 |
| 5 | 18 ÷ 11 = 1 remainder 7 |
| 6 | 11 ÷ 7 = 1 remainder 4 |
| 7 | 7 ÷ 4 = 1 remainder 3 |
| 8 | 4 ÷ 3 = 1 remainder 1 |
| 9 | 3 ÷ 1 = 3 remainder 0 |
Examples of LCM Calculations
| Numbers | LCM |
|---|---|
| 102 and 67 | 6834 |
| 186 and 100 | 9300 |
| 27 and 130 | 3510 |
| 138 and 144 | 3312 |
| 108 and 81 | 324 |