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arithmetic n.  and  Zumkeller n.

First numbers that belong to both sets:

6, 20, 30, 42, 54, 56, 60, 66, 70, 78, 96, 102, 114, 126, 132, 138, 140, 150, 168, 174, 186, 198, 204, 210, 220, 222, 224, 246, 258, 260, 264, 270, 276, 280, 282, 294, 304, 308, 318, 330, 340, 342, 348, 350, 352, 354, 366, 378, 380, 390, 402, 414, 420, 426, 432, 438, 456, 460, 462, 464, 474, 476, 480, 486, 492, 498, 500, 504, 510, 534, 540, 546, 550, 552, 558, 564, 570, 572, 580, 582, 594, 606, 608, 612, 616, 618, 620, 630, 636, 642, 644, 654, 660, 672, 678, 690, 702, 708, 714, 726, 728, 736, 740, 744, 750, 762, 770, 780, 786, 798, 812, 820, 822, 832, 834, 836, 840, 852, 858, 860, 864, 870, 894, 906, 910, 912, 918, 920, 924, 930, 940, 942, 945, 952, 966, 978, 980, 990, 992, 996, 1002, 1014, 1020, 1026, 1032, 1038, 1050, 1056, 1060, 1064, 1068, 1074, 1086, 1110, 1120, 1122, 1128, 1140, 1146, 1148, 1158, 1180, 1182, 1188, 1190, 1194, 1212, 1218, 1220, 1230, 1240, 1242, 1248, 1254, 1266, 1284, 1288, 1290, 1302, 1316, 1320, 1326, 1330, 1338, 1340, 1350, 1356, 1362, 1374, 1376, 1380, 1386, 1392, 1398, 1400, 1410, 1416, 1420, 1428, 1430, 1434, 1446, 1460, 1470, 1482, 1484, 1500, 1504, 1506, 1512, 1518, 1520, 1540, 1542, 1554, 1566, 1572, 1578, 1580, 1590, 1608, 1610, 1614, 1624, 1626, 1632, 1638, 1644, 1650, 1652, 1656, 1660, 1662, 1672, 1674, 1686, 1698, 1700, 1704, 1710, 1716, 1722, 1734, 1736, 1740, 1750, 1758, 1760, 1770, 1780, 1788, 1794, 1806, 1820, 1824, 1830, 1836, 1842, 1848, 1860, 1866, 1870, 1878, 1880, 1888, 1890, 1896, 1902, 1908, 1914, 1932, 1938, 1940, 1950, 1974, 1980, 1986, 1988, 1992, 1998.

Some larger examples :