Answer
Multiples of 1521 are:
1521, 3042, 4563, 6084, 7605, 9126, 10647, 12168, 13689, 15210, 16731, 18252, 19773, 21294, 22815, 24336, 25857, 27378, 28899, 30420, 31941, 33462, 34983, 36504, 38025, 39546, 41067, 42588, 44109, 45630, 47151, 48672, 50193, 51714, 53235, 54756, 56277, 57798, 59319, 60840, 62361, 63882, 65403, 66924, 68445, 69966, 71487, 73008, 74529
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