28178480

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^2\times {\mathrm{41}}^1\times {\mathrm{71}}^1$

素因数の和:147

約数の個数: 120

約数和(自身を含む): 74807712

約数和(自身を除く): 46629232

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 41, 44, 55, 71, 80, 82, 88, 110, 121, 142, 164, 176, 205, 220, 242, 284, 328, 355, 410, 440, 451, 484, 568, 605, 656, 710, 781, 820, 880, 902, 968, 1136, 1210, 1420, 1562, 1640, 1804, 1936, 2255, 2420, 2840, 2911, 3124, 3280, 3608, 3905, 4510, 4840, 4961, 5680, 5822, 6248, 7216, 7810, 8591, 9020, 9680, 9922, 11644, 12496, 14555, 15620, 17182, 18040, 19844, 23288, 24805, 29110, 31240, 32021, 34364, 36080, 39688, 42955, 46576, 49610, 58220, 62480, 64042, 68728, 79376, 85910, 99220, 116440, 128084, 137456, 160105, 171820, 198440, 232880, 256168, 320210, 343640, 352231, 396880, 512336, 640420, 687280, 704462, 1280840, 1408924, 1761155, 2561680, 2817848, 3522310, 5635696, 7044620, 14089240, 28178480]

約数ペア:

[(1, 28178480), (2, 14089240), (4, 7044620), (5, 5635696), (8, 3522310), (10, 2817848), (11, 2561680), (16, 1761155), (20, 1408924), (22, 1280840), (40, 704462), (41, 687280), (44, 640420), (55, 512336), (71, 396880), (80, 352231), (82, 343640), (88, 320210), (110, 256168), (121, 232880), (142, 198440), (164, 171820), (176, 160105), (205, 137456), (220, 128084), (242, 116440), (284, 99220), (328, 85910), (355, 79376), (410, 68728), (440, 64042), (451, 62480), (484, 58220), (568, 49610), (605, 46576), (656, 42955), (710, 39688), (781, 36080), (820, 34364), (880, 32021), (902, 31240), (968, 29110), (1136, 24805), (1210, 23288), (1420, 19844), (1562, 18040), (1640, 17182), (1804, 15620), (1936, 14555), (2255, 12496), (2420, 11644), (2840, 9922), (2911, 9680), (3124, 9020), (3280, 8591), (3608, 7810), (3905, 7216), (4510, 6248), (4840, 5822), (4961, 5680)]