81511976

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:199

約数の個数: 128

約数和(自身を含む): 203212800

約数和(自身を除く): 121700824

約数列:

[1, 2, 4, 7, 8, 13, 14, 19, 26, 28, 38, 52, 56, 71, 76, 83, 91, 104, 133, 142, 152, 166, 182, 247, 266, 284, 332, 364, 494, 497, 532, 568, 581, 664, 728, 923, 988, 994, 1064, 1079, 1162, 1349, 1577, 1729, 1846, 1976, 1988, 2158, 2324, 2698, 3154, 3458, 3692, 3976, 4316, 4648, 5396, 5893, 6308, 6461, 6916, 7384, 7553, 8632, 9443, 10792, 11039, 11786, 12616, 12922, 13832, 15106, 17537, 18886, 20501, 22078, 23572, 25844, 30212, 35074, 37772, 41002, 41251, 44156, 47144, 51688, 60424, 70148, 75544, 76609, 82004, 82502, 88312, 111967, 122759, 140296, 143507, 153218, 164008, 165004, 223934, 245518, 287014, 306436, 330008, 447868, 491036, 536263, 574028, 612872, 783769, 895736, 982072, 1072526, 1148056, 1455571, 1567538, 2145052, 2911142, 3135076, 4290104, 5822284, 6270152, 10188997, 11644568, 20377994, 40755988, 81511976]

約数ペア:

[(1, 81511976), (2, 40755988), (4, 20377994), (7, 11644568), (8, 10188997), (13, 6270152), (14, 5822284), (19, 4290104), (26, 3135076), (28, 2911142), (38, 2145052), (52, 1567538), (56, 1455571), (71, 1148056), (76, 1072526), (83, 982072), (91, 895736), (104, 783769), (133, 612872), (142, 574028), (152, 536263), (166, 491036), (182, 447868), (247, 330008), (266, 306436), (284, 287014), (332, 245518), (364, 223934), (494, 165004), (497, 164008), (532, 153218), (568, 143507), (581, 140296), (664, 122759), (728, 111967), (923, 88312), (988, 82502), (994, 82004), (1064, 76609), (1079, 75544), (1162, 70148), (1349, 60424), (1577, 51688), (1729, 47144), (1846, 44156), (1976, 41251), (1988, 41002), (2158, 37772), (2324, 35074), (2698, 30212), (3154, 25844), (3458, 23572), (3692, 22078), (3976, 20501), (4316, 18886), (4648, 17537), (5396, 15106), (5893, 13832), (6308, 12922), (6461, 12616), (6916, 11786), (7384, 11039), (7553, 10792), (8632, 9443)]