Search a number
deficient n.  and  uban n.

First numbers that belong to both sets:

1, 2, 3, 5, 7, 8, 9, 10, 11, 13, 15, 16, 17, 19, 21, 22, 23, 25, 26, 27, 29, 31, 32, 33, 35, 37, 38, 39, 41, 43, 45, 46, 47, 49, 50, 51, 52, 53, 55, 57, 58, 59, 61, 62, 63, 65, 67, 68, 69, 71, 73, 75, 76, 77, 79, 81, 82, 83, 85, 86, 87, 89, 91, 92, 93, 95, 97, 98, 99, 1000001, 1000003, 1000005, 1000006, 1000007, 1000009, 1000010, 1000011, 1000012, 1000013, 1000015, 1000016, 1000017, 1000018, 1000019, 1000021, 1000022, 1000023, 1000025, 1000027, 1000028, 1000029, 1000030, 1000031, 1000033, 1000035, 1000036, 1000037, 1000039, 1000041, 1000042, 1000043, 1000045, 1000046, 1000047, 1000049, 1000051, 1000052, 1000053, 1000055, 1000057, 1000058, 1000059, 1000061, 1000063, 1000065, 1000066, 1000067, 1000069, 1000070, 1000071, 1000072, 1000073, 1000075, 1000077, 1000078, 1000079, 1000081, 1000082, 1000083, 1000085, 1000087, 1000088, 1000089, 1000091, 1000093, 1000095, 1000096, 1000097, 1000099, 2000001, 2000002, 2000003, 2000005, 2000006, 2000007, 2000008, 2000009, 2000011, 2000013, 2000015, 2000017, 2000018, 2000019, 2000021, 2000023, 2000025, 2000026, 2000027, 2000029, 2000030, 2000031, 2000032, 2000033, 2000035, 2000036, 2000037, 2000038, 2000039, 2000041, 2000042, 2000043, 2000045, 2000047, 2000048, 2000049, 2000051, 2000053, 2000055, 2000056, 2000057, 2000059, 2000061, 2000062, 2000063, 2000065, 2000066, 2000067, 2000069, 2000071, 2000073, 2000075, 2000077, 2000078, 2000079, 2000081, 2000083, 2000085, 2000086, 2000087, 2000089, 2000090, 2000091, 2000092, 2000093, 2000095, 2000097, 2000098, 2000099, 3000001, 3000002, 3000003, 3000005, 3000007, 3000009, 3000010, 3000011, 3000013, 3000015, 3000016, 3000017, 3000019, 3000021, 3000022, 3000023, 3000025, 3000026, 3000027, 3000028, 3000029, 3000031, 3000033, 3000035, 3000037, 3000038, 3000039, 3000041, 3000043, 3000045, 3000046, 3000047, 3000049, 3000050, 3000051, 3000052, 3000053, 3000055, 3000056, 3000057, 3000058, 3000059, 3000061, 3000062, 3000063, 3000065, 3000067, 3000068, 3000069, 3000070, 3000071, 3000073, 3000075, 3000076, 3000077, 3000079, 3000081, 3000082, 3000083, 3000085, 3000086, 3000087, 3000089, 3000091, 3000092, 3000093, 3000095, 3000097, 3000098, 3000099, 5000001, 5000002.

Some larger examples :