二进制转十进制对照表（2的幂）
| 2的次方 | 二进制 | 十进制 |
|---|---|---|
| $2^0$ | 1 | 1 |
| $2^1$ | 10 | 2 |
| $2^2$ | 100 | 4 |
| $2^3$ | 1000 | 8 |
| $2^4$ | 10000 | 16 |
| $2^5$ | 100000 | 32 |
| $2^6$ | 1000000 | 64 |
| $2^7$ | 10000000 | 128 |
| $2^8$ | 100000000 | 256 |
| $2^9$ | 1000000000 | 512 |
| $2^{10}$ | 10000000000 | 1024 |
| $2^{11}$ | 100000000000 | 2048 |
| $2^{12}$ | 1000000000000 | 4096 |
| $2^{13}$ | 10000000000000 | 8192 |
| $2^{14}$ | 100000000000000 | 16384 |
| $2^{15}$ | 1000000000000000 | 32768 |
| $2^{16}$ | 10000000000000000 | 65536 |
| $2^{17}$ | 100000000000000000 | 131072 |
| $2^{18}$ | 1000000000000000000 | 262144 |
| $2^{19}$ | 10000000000000000000 | 524288 |
| $2^{20}$ | 100000000000000000000 | 1048576 |
简单记忆小技巧
- $2^{10}=1024$，也就是1K
- $2^{20}=1048576$，也就是1M