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amicable n.  and  arithmetic n.

First numbers that belong to both sets:

220, 284, 2620, 2924, 5020, 5564, 6368, 10744, 10856, 12285, 14595, 63020, 66928, 66992, 67095, 69615, 71145, 76084, 79750, 87633, 88730, 100485, 122265, 122368, 123152, 124155, 139815, 141664, 142310, 168730, 176272, 180848, 185368, 196724, 202444, 203432, 280540, 308620, 319550, 356408, 365084, 389924, 399592, 430402, 437456, 455344, 469028, 522405, 525915, 600392, 609928, 635624, 643336, 652664, 667964, 669688, 686072, 691256, 712216, 783556, 796696, 802725, 863835, 879712, 898216, 947835, 980984, 1043096, 1077890, 1099390, 1125765, 1154450, 1156870, 1175265, 1185376, 1189150, 1280565, 1292570, 1328470, 1340235, 1358595, 1392368, 1438983, 1464592, 1466150, 1468324, 1483850, 1486845, 1511930, 1598470, 1669910, 1747930, 1749212, 1798875, 1870245, 2062570, 2082464, 2090656, 2236570, 2429030, 2652728, 2728726, 2739704, 2803580, 2928136, 2941672, 3077354, 3276856, 3606850, 3716164, 3721544, 3786904, 3805264, 3892670, 4006736, 4238984, 4246130, 4259750, 4300136, 4314616, 4445050, 4482765, 4488910, 4532710, 4604776, 5120595, 5123090, 5147032, 5162744, 5232010, 5357625, 5385310, 5495264, 5504110, 5684679, 5726072, 5730615, 5799542, 5812130, 5843048, 5864660, 6088905, 6135962, 6329416, 6369928, 6371384, 6377175, 6680025, 6955216, 6993610, 7158710, 7275532, 7288930, 7418864, 7471508, 7489112, 7489324, 7577350, 7674088, 7677248, 7684672, 7800544, 7850512, 8221598, 8262136, 8369864, 8493050, 8619765, 8666860, 8754130, 8826070, 9071685, 9199496, 9206925, 9339704, 9363584, 9437056, 9478910, 9491625, 9498555, 9592504, 9627915, 9660950, 9773505, 9892936.