Answer
Multiples of 1720 are:
1720, 3440, 5160, 6880, 8600, 10320, 12040, 13760, 15480, 17200, 18920, 20640, 22360, 24080, 25800, 27520, 29240, 30960, 32680, 34400, 36120, 37840, 39560, 41280, 43000, 44720, 46440, 48160, 49880, 51600, 53320, 55040, 56760, 58480, 60200, 61920, 63640, 65360, 67080, 68800, 70520, 72240, 73960, 75680, 77400, 79120, 80840, 82560, 84280
Related links: