20571824

素因数分解:

$2^4\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{199}}^1$

素因数の和:298

約数の個数: 80

約数和(自身を含む): 49996800

約数和(自身を除く): 29424976

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 52, 56, 71, 91, 104, 112, 142, 182, 199, 208, 284, 364, 398, 497, 568, 728, 796, 923, 994, 1136, 1393, 1456, 1592, 1846, 1988, 2587, 2786, 3184, 3692, 3976, 5174, 5572, 6461, 7384, 7952, 10348, 11144, 12922, 14129, 14768, 18109, 20696, 22288, 25844, 28258, 36218, 41392, 51688, 56516, 72436, 98903, 103376, 113032, 144872, 183677, 197806, 226064, 289744, 367354, 395612, 734708, 791224, 1285739, 1469416, 1582448, 2571478, 2938832, 5142956, 10285912, 20571824]

約数ペア:

[(1, 20571824), (2, 10285912), (4, 5142956), (7, 2938832), (8, 2571478), (13, 1582448), (14, 1469416), (16, 1285739), (26, 791224), (28, 734708), (52, 395612), (56, 367354), (71, 289744), (91, 226064), (104, 197806), (112, 183677), (142, 144872), (182, 113032), (199, 103376), (208, 98903), (284, 72436), (364, 56516), (398, 51688), (497, 41392), (568, 36218), (728, 28258), (796, 25844), (923, 22288), (994, 20696), (1136, 18109), (1393, 14768), (1456, 14129), (1592, 12922), (1846, 11144), (1988, 10348), (2587, 7952), (2786, 7384), (3184, 6461), (3692, 5572), (3976, 5174)]