21328736

素因数分解:

$2^5\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{59}}^1\times {\mathrm{79}}^1$

素因数の和:172

約数の個数: 96

約数和(自身を含む): 50803200

約数和(自身を除く): 29474464

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 32, 44, 52, 59, 79, 88, 104, 118, 143, 158, 176, 208, 236, 286, 316, 352, 416, 472, 572, 632, 649, 767, 869, 944, 1027, 1144, 1264, 1298, 1534, 1738, 1888, 2054, 2288, 2528, 2596, 3068, 3476, 4108, 4576, 4661, 5192, 6136, 6952, 8216, 8437, 9322, 10384, 11297, 12272, 13904, 16432, 16874, 18644, 20768, 22594, 24544, 27808, 32864, 33748, 37288, 45188, 51271, 60593, 67496, 74576, 90376, 102542, 121186, 134992, 149152, 180752, 205084, 242372, 269984, 361504, 410168, 484744, 666523, 820336, 969488, 1333046, 1640672, 1938976, 2666092, 5332184, 10664368, 21328736]

約数ペア:

[(1, 21328736), (2, 10664368), (4, 5332184), (8, 2666092), (11, 1938976), (13, 1640672), (16, 1333046), (22, 969488), (26, 820336), (32, 666523), (44, 484744), (52, 410168), (59, 361504), (79, 269984), (88, 242372), (104, 205084), (118, 180752), (143, 149152), (158, 134992), (176, 121186), (208, 102542), (236, 90376), (286, 74576), (316, 67496), (352, 60593), (416, 51271), (472, 45188), (572, 37288), (632, 33748), (649, 32864), (767, 27808), (869, 24544), (944, 22594), (1027, 20768), (1144, 18644), (1264, 16874), (1298, 16432), (1534, 13904), (1738, 12272), (1888, 11297), (2054, 10384), (2288, 9322), (2528, 8437), (2596, 8216), (3068, 6952), (3476, 6136), (4108, 5192), (4576, 4661)]