18788720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{263}}^1$

素因数の和:342

約数の個数: 80

約数和(自身を含む): 47139840

約数和(自身を除く): 28351120

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 47, 76, 80, 94, 95, 152, 188, 190, 235, 263, 304, 376, 380, 470, 526, 752, 760, 893, 940, 1052, 1315, 1520, 1786, 1880, 2104, 2630, 3572, 3760, 4208, 4465, 4997, 5260, 7144, 8930, 9994, 10520, 12361, 14288, 17860, 19988, 21040, 24722, 24985, 35720, 39976, 49444, 49970, 61805, 71440, 79952, 98888, 99940, 123610, 197776, 199880, 234859, 247220, 399760, 469718, 494440, 939436, 988880, 1174295, 1878872, 2348590, 3757744, 4697180, 9394360, 18788720]

約数ペア:

[(1, 18788720), (2, 9394360), (4, 4697180), (5, 3757744), (8, 2348590), (10, 1878872), (16, 1174295), (19, 988880), (20, 939436), (38, 494440), (40, 469718), (47, 399760), (76, 247220), (80, 234859), (94, 199880), (95, 197776), (152, 123610), (188, 99940), (190, 98888), (235, 79952), (263, 71440), (304, 61805), (376, 49970), (380, 49444), (470, 39976), (526, 35720), (752, 24985), (760, 24722), (893, 21040), (940, 19988), (1052, 17860), (1315, 14288), (1520, 12361), (1786, 10520), (1880, 9994), (2104, 8930), (2630, 7144), (3572, 5260), (3760, 4997), (4208, 4465)]