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abundant n.  and  tau n.

First numbers that belong to both sets:

12, 18, 24, 36, 40, 56, 60, 72, 80, 84, 88, 96, 104, 108, 132, 156, 180, 204, 228, 240, 252, 276, 288, 348, 360, 372, 384, 396, 444, 448, 450, 468, 480, 492, 504, 516, 560, 564, 600, 612, 636, 640, 672, 684, 708, 720, 732, 792, 804, 828, 852, 864, 876, 880, 882, 896, 936, 948, 972, 996, 1040, 1044, 1056, 1068, 1116, 1152, 1164, 1176, 1200, 1212, 1224, 1236, 1248, 1260, 1284, 1308, 1332, 1344, 1356, 1360, 1368, 1408, 1440, 1476, 1520, 1524, 1548, 1572, 1620, 1632, 1644, 1656, 1664, 1668, 1680, 1692, 1788, 1800, 1812, 1824, 1840, 1884, 1908, 1920, 1944, 1956, 1980, 2000, 2004, 2016, 2076, 2088, 2124, 2148, 2160, 2172, 2176, 2178, 2196, 2208, 2232, 2240, 2292, 2316, 2320, 2340, 2364, 2388, 2412, 2432, 2480, 2532, 2556, 2560, 2628, 2640, 2664, 2676, 2688, 2700, 2724, 2748, 2772, 2784, 2796, 2844, 2868, 2892, 2904, 2944, 2952, 2960, 2976, 2988, 3012, 3042, 3060, 3084, 3096, 3120, 3156, 3168, 3204, 3228, 3240, 3252, 3276, 3280, 3324, 3360, 3372, 3384, 3396, 3420, 3440, 3456, 3492, 3516, 3528, 3552, 3600, 3636, 3684, 3708, 3712, 3732, 3744, 3756, 3760, 3804, 3816, 3852, 3924, 3936, 3968, 3972, 4032, 4044, 4050, 4056, 4068, 4080, 4128, 4140, 4164, 4188, 4224, 4236, 4240, 4248, 4284, 4308, 4320, 4392, 4404, 4476, 4480, 4500, 4512, 4548, 4560, 4572, 4596, 4668, 4716, 4720, 4736, 4764, 4788, 4812, 4824, 4860, 4880, 4896, 4908, 4928, 4932, 4992, 5000, 5004, 5028, 5040, 5052, 5088, 5112, 5148, 5172, 5196, 5202, 5220, 5248, 5256, 5268, 5280, 5292, 5316, 5360, 5364, 5388, 5436, 5472, 5484, 5504, 5520, 5532, 5556, 5580, 5604, 5652, 5664, 5680, 5688, 5748, 5760, 5796, 5824, 5840, 5844, 5856, 5868.

Some larger examples :