Answer
Multiples of 1287 are:
1287, 2574, 3861, 5148, 6435, 7722, 9009, 10296, 11583, 12870, 14157, 15444, 16731, 18018, 19305, 20592, 21879, 23166, 24453, 25740, 27027, 28314, 29601, 30888, 32175, 33462, 34749, 36036, 37323, 38610, 39897, 41184, 42471, 43758, 45045, 46332, 47619, 48906, 50193, 51480, 52767, 54054, 55341, 56628, 57915, 59202, 60489, 61776, 63063
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