
在500以内,13的倍数有:
* 13
* 26
* 39
* 52
* 65
* 78
* 91
* 104
* 117
* 130
* 143
* 156
* 169
* 182
* 195
* 208
* 221
* 234
* 247
* 260
* 273
* 286
* 309
* 322
* 335
* 348
* 361
* 374
* 387
* 400
* 413
* 426
* 439
* 452
* 465
* 478
13,26,39,52,65,78,91,104,117,130,143,156,169,182,195,208,221,234,247,260,273,286,299,312,325,338,351,364,377,390,403,416,429,442,455,468,481,494
