25580720

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{709}}^1$

素因数の和:774

約数の個数: 80

約数和(自身を含む): 66558240

約数和(自身を除く): 40977520

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 41, 44, 55, 80, 82, 88, 110, 164, 176, 205, 220, 328, 410, 440, 451, 656, 709, 820, 880, 902, 1418, 1640, 1804, 2255, 2836, 3280, 3545, 3608, 4510, 5672, 7090, 7216, 7799, 9020, 11344, 14180, 15598, 18040, 28360, 29069, 31196, 36080, 38995, 56720, 58138, 62392, 77990, 116276, 124784, 145345, 155980, 232552, 290690, 311960, 319759, 465104, 581380, 623920, 639518, 1162760, 1279036, 1598795, 2325520, 2558072, 3197590, 5116144, 6395180, 12790360, 25580720]

約数ペア:

[(1, 25580720), (2, 12790360), (4, 6395180), (5, 5116144), (8, 3197590), (10, 2558072), (11, 2325520), (16, 1598795), (20, 1279036), (22, 1162760), (40, 639518), (41, 623920), (44, 581380), (55, 465104), (80, 319759), (82, 311960), (88, 290690), (110, 232552), (164, 155980), (176, 145345), (205, 124784), (220, 116276), (328, 77990), (410, 62392), (440, 58138), (451, 56720), (656, 38995), (709, 36080), (820, 31196), (880, 29069), (902, 28360), (1418, 18040), (1640, 15598), (1804, 14180), (2255, 11344), (2836, 9020), (3280, 7799), (3545, 7216), (3608, 7090), (4510, 5672)]