Answer
Multiples of 1231 are:
1231, 2462, 3693, 4924, 6155, 7386, 8617, 9848, 11079, 12310, 13541, 14772, 16003, 17234, 18465, 19696, 20927, 22158, 23389, 24620, 25851, 27082, 28313, 29544, 30775, 32006, 33237, 34468, 35699, 36930, 38161, 39392, 40623, 41854, 43085, 44316, 45547, 46778, 48009, 49240, 50471, 51702, 52933, 54164, 55395, 56626, 57857, 59088, 60319
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