81287440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{1663}}^1$

素因数の和:1736

約数の個数: 80

約数和(自身を含む): 207986688

約数和(自身を除く): 126699248

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 47, 52, 65, 80, 94, 104, 130, 188, 208, 235, 260, 376, 470, 520, 611, 752, 940, 1040, 1222, 1663, 1880, 2444, 3055, 3326, 3760, 4888, 6110, 6652, 8315, 9776, 12220, 13304, 16630, 21619, 24440, 26608, 33260, 43238, 48880, 66520, 78161, 86476, 108095, 133040, 156322, 172952, 216190, 312644, 345904, 390805, 432380, 625288, 781610, 864760, 1016093, 1250576, 1563220, 1729520, 2032186, 3126440, 4064372, 5080465, 6252880, 8128744, 10160930, 16257488, 20321860, 40643720, 81287440]

約数ペア:

[(1, 81287440), (2, 40643720), (4, 20321860), (5, 16257488), (8, 10160930), (10, 8128744), (13, 6252880), (16, 5080465), (20, 4064372), (26, 3126440), (40, 2032186), (47, 1729520), (52, 1563220), (65, 1250576), (80, 1016093), (94, 864760), (104, 781610), (130, 625288), (188, 432380), (208, 390805), (235, 345904), (260, 312644), (376, 216190), (470, 172952), (520, 156322), (611, 133040), (752, 108095), (940, 86476), (1040, 78161), (1222, 66520), (1663, 48880), (1880, 43238), (2444, 33260), (3055, 26608), (3326, 24440), (3760, 21619), (4888, 16630), (6110, 13304), (6652, 12220), (8315, 9776)]