28990720

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:132

約数の個数: 144

約数和(自身を含む): 79470720

約数和(自身を除く): 50480000

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 32, 40, 44, 55, 58, 64, 71, 80, 88, 110, 116, 128, 142, 145, 160, 176, 220, 232, 256, 284, 290, 319, 320, 352, 355, 440, 464, 568, 580, 638, 640, 704, 710, 781, 880, 928, 1136, 1160, 1276, 1280, 1408, 1420, 1562, 1595, 1760, 1856, 2059, 2272, 2320, 2552, 2816, 2840, 3124, 3190, 3520, 3712, 3905, 4118, 4544, 4640, 5104, 5680, 6248, 6380, 7040, 7424, 7810, 8236, 9088, 9280, 10208, 10295, 11360, 12496, 12760, 14080, 15620, 16472, 18176, 18560, 20416, 20590, 22649, 22720, 24992, 25520, 31240, 32944, 37120, 40832, 41180, 45298, 45440, 49984, 51040, 62480, 65888, 81664, 82360, 90596, 90880, 99968, 102080, 113245, 124960, 131776, 164720, 181192, 199936, 204160, 226490, 249920, 263552, 329440, 362384, 408320, 452980, 499840, 527104, 658880, 724768, 905960, 999680, 1317760, 1449536, 1811920, 2635520, 2899072, 3623840, 5798144, 7247680, 14495360, 28990720]

約数ペア:

[(1, 28990720), (2, 14495360), (4, 7247680), (5, 5798144), (8, 3623840), (10, 2899072), (11, 2635520), (16, 1811920), (20, 1449536), (22, 1317760), (29, 999680), (32, 905960), (40, 724768), (44, 658880), (55, 527104), (58, 499840), (64, 452980), (71, 408320), (80, 362384), (88, 329440), (110, 263552), (116, 249920), (128, 226490), (142, 204160), (145, 199936), (160, 181192), (176, 164720), (220, 131776), (232, 124960), (256, 113245), (284, 102080), (290, 99968), (319, 90880), (320, 90596), (352, 82360), (355, 81664), (440, 65888), (464, 62480), (568, 51040), (580, 49984), (638, 45440), (640, 45298), (704, 41180), (710, 40832), (781, 37120), (880, 32944), (928, 31240), (1136, 25520), (1160, 24992), (1276, 22720), (1280, 22649), (1408, 20590), (1420, 20416), (1562, 18560), (1595, 18176), (1760, 16472), (1856, 15620), (2059, 14080), (2272, 12760), (2320, 12496), (2552, 11360), (2816, 10295), (2840, 10208), (3124, 9280), (3190, 9088), (3520, 8236), (3712, 7810), (3905, 7424), (4118, 7040), (4544, 6380), (4640, 6248), (5104, 5680)]