21890720

素因数分解:

$2^5\times 5^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1$

素因数の和:174

約数の個数: 96

約数和(自身を含む): 54867456

約数和(自身を除く): 32976736

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 41, 47, 71, 80, 82, 94, 142, 160, 164, 188, 205, 235, 284, 328, 355, 376, 410, 470, 568, 656, 710, 752, 820, 940, 1136, 1312, 1420, 1504, 1640, 1880, 1927, 2272, 2840, 2911, 3280, 3337, 3760, 3854, 5680, 5822, 6560, 6674, 7520, 7708, 9635, 11360, 11644, 13348, 14555, 15416, 16685, 19270, 23288, 26696, 29110, 30832, 33370, 38540, 46576, 53392, 58220, 61664, 66740, 77080, 93152, 106784, 116440, 133480, 136817, 154160, 232880, 266960, 273634, 308320, 465760, 533920, 547268, 684085, 1094536, 1368170, 2189072, 2736340, 4378144, 5472680, 10945360, 21890720]

約数ペア:

[(1, 21890720), (2, 10945360), (4, 5472680), (5, 4378144), (8, 2736340), (10, 2189072), (16, 1368170), (20, 1094536), (32, 684085), (40, 547268), (41, 533920), (47, 465760), (71, 308320), (80, 273634), (82, 266960), (94, 232880), (142, 154160), (160, 136817), (164, 133480), (188, 116440), (205, 106784), (235, 93152), (284, 77080), (328, 66740), (355, 61664), (376, 58220), (410, 53392), (470, 46576), (568, 38540), (656, 33370), (710, 30832), (752, 29110), (820, 26696), (940, 23288), (1136, 19270), (1312, 16685), (1420, 15416), (1504, 14555), (1640, 13348), (1880, 11644), (1927, 11360), (2272, 9635), (2840, 7708), (2911, 7520), (3280, 6674), (3337, 6560), (3760, 5822), (3854, 5680)]