18723978

素因数分解:

$2^1\times 3^2\times 7^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:129

約数の個数: 144

約数和(自身を含む): 53778816

約数和(自身を除く): 35054838

約数列:

[1, 2, 3, 6, 7, 9, 13, 14, 18, 21, 23, 26, 39, 42, 46, 49, 63, 69, 71, 78, 91, 98, 117, 126, 138, 142, 147, 161, 182, 207, 213, 234, 273, 294, 299, 322, 414, 426, 441, 483, 497, 546, 598, 637, 639, 819, 882, 897, 923, 966, 994, 1127, 1274, 1278, 1449, 1491, 1633, 1638, 1794, 1846, 1911, 2093, 2254, 2691, 2769, 2898, 2982, 3266, 3381, 3479, 3822, 4186, 4473, 4899, 5382, 5538, 5733, 6279, 6461, 6762, 6958, 8307, 8946, 9798, 10143, 10437, 11431, 11466, 12558, 12922, 14651, 14697, 16614, 18837, 19383, 20286, 20874, 21229, 22862, 29302, 29394, 31311, 34293, 37674, 38766, 42458, 43953, 45227, 58149, 62622, 63687, 68586, 80017, 87906, 90454, 102879, 116298, 127374, 131859, 135681, 148603, 160034, 191061, 205758, 240051, 263718, 271362, 297206, 382122, 407043, 445809, 480102, 720153, 814086, 891618, 1040221, 1337427, 1440306, 2080442, 2674854, 3120663, 6241326, 9361989, 18723978]

約数ペア:

[(1, 18723978), (2, 9361989), (3, 6241326), (6, 3120663), (7, 2674854), (9, 2080442), (13, 1440306), (14, 1337427), (18, 1040221), (21, 891618), (23, 814086), (26, 720153), (39, 480102), (42, 445809), (46, 407043), (49, 382122), (63, 297206), (69, 271362), (71, 263718), (78, 240051), (91, 205758), (98, 191061), (117, 160034), (126, 148603), (138, 135681), (142, 131859), (147, 127374), (161, 116298), (182, 102879), (207, 90454), (213, 87906), (234, 80017), (273, 68586), (294, 63687), (299, 62622), (322, 58149), (414, 45227), (426, 43953), (441, 42458), (483, 38766), (497, 37674), (546, 34293), (598, 31311), (637, 29394), (639, 29302), (819, 22862), (882, 21229), (897, 20874), (923, 20286), (966, 19383), (994, 18837), (1127, 16614), (1274, 14697), (1278, 14651), (1449, 12922), (1491, 12558), (1633, 11466), (1638, 11431), (1794, 10437), (1846, 10143), (1911, 9798), (2093, 8946), (2254, 8307), (2691, 6958), (2769, 6762), (2898, 6461), (2982, 6279), (3266, 5733), (3381, 5538), (3479, 5382), (3822, 4899), (4186, 4473)]