Answer
Multiples of 687 are:
687, 1374, 2061, 2748, 3435, 4122, 4809, 5496, 6183, 6870, 7557, 8244, 8931, 9618, 10305, 10992, 11679, 12366, 13053, 13740, 14427, 15114, 15801, 16488, 17175, 17862, 18549, 19236, 19923, 20610, 21297, 21984, 22671, 23358, 24045, 24732, 25419, 26106, 26793, 27480, 28167, 28854, 29541, 30228, 30915, 31602, 32289, 32976, 33663
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