21037016

素因数分解:

$2^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1$

素因数の和:145

約数の個数: 128

約数和(自身を含む): 55157760

約数和(自身を除く): 34120744

約数列:

[1, 2, 4, 7, 8, 11, 13, 14, 22, 26, 28, 37, 44, 52, 56, 71, 74, 77, 88, 91, 104, 142, 143, 148, 154, 182, 259, 284, 286, 296, 308, 364, 407, 481, 497, 518, 568, 572, 616, 728, 781, 814, 923, 962, 994, 1001, 1036, 1144, 1562, 1628, 1846, 1924, 1988, 2002, 2072, 2627, 2849, 3124, 3256, 3367, 3692, 3848, 3976, 4004, 5254, 5291, 5467, 5698, 6248, 6461, 6734, 7384, 8008, 10153, 10508, 10582, 10934, 11396, 12922, 13468, 18389, 20306, 21016, 21164, 21868, 22792, 25844, 26936, 28897, 34151, 36778, 37037, 40612, 42328, 43736, 51688, 57794, 68302, 71071, 73556, 74074, 81224, 115588, 136604, 142142, 147112, 148148, 202279, 231176, 239057, 273208, 284284, 296296, 375661, 404558, 478114, 568568, 751322, 809116, 956228, 1502644, 1618232, 1912456, 2629627, 3005288, 5259254, 10518508, 21037016]

約数ペア:

[(1, 21037016), (2, 10518508), (4, 5259254), (7, 3005288), (8, 2629627), (11, 1912456), (13, 1618232), (14, 1502644), (22, 956228), (26, 809116), (28, 751322), (37, 568568), (44, 478114), (52, 404558), (56, 375661), (71, 296296), (74, 284284), (77, 273208), (88, 239057), (91, 231176), (104, 202279), (142, 148148), (143, 147112), (148, 142142), (154, 136604), (182, 115588), (259, 81224), (284, 74074), (286, 73556), (296, 71071), (308, 68302), (364, 57794), (407, 51688), (481, 43736), (497, 42328), (518, 40612), (568, 37037), (572, 36778), (616, 34151), (728, 28897), (781, 26936), (814, 25844), (923, 22792), (962, 21868), (994, 21164), (1001, 21016), (1036, 20306), (1144, 18389), (1562, 13468), (1628, 12922), (1846, 11396), (1924, 10934), (1988, 10582), (2002, 10508), (2072, 10153), (2627, 8008), (2849, 7384), (3124, 6734), (3256, 6461), (3367, 6248), (3692, 5698), (3848, 5467), (3976, 5291), (4004, 5254)]