20931920

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{293}}^1$

素因数の和:372

約数の個数: 80

約数和(自身を含む): 52496640

約数和(自身を除く): 31564720

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 47, 76, 80, 94, 95, 152, 188, 190, 235, 293, 304, 376, 380, 470, 586, 752, 760, 893, 940, 1172, 1465, 1520, 1786, 1880, 2344, 2930, 3572, 3760, 4465, 4688, 5567, 5860, 7144, 8930, 11134, 11720, 13771, 14288, 17860, 22268, 23440, 27542, 27835, 35720, 44536, 55084, 55670, 68855, 71440, 89072, 110168, 111340, 137710, 220336, 222680, 261649, 275420, 445360, 523298, 550840, 1046596, 1101680, 1308245, 2093192, 2616490, 4186384, 5232980, 10465960, 20931920]

約数ペア:

[(1, 20931920), (2, 10465960), (4, 5232980), (5, 4186384), (8, 2616490), (10, 2093192), (16, 1308245), (19, 1101680), (20, 1046596), (38, 550840), (40, 523298), (47, 445360), (76, 275420), (80, 261649), (94, 222680), (95, 220336), (152, 137710), (188, 111340), (190, 110168), (235, 89072), (293, 71440), (304, 68855), (376, 55670), (380, 55084), (470, 44536), (586, 35720), (752, 27835), (760, 27542), (893, 23440), (940, 22268), (1172, 17860), (1465, 14288), (1520, 13771), (1786, 11720), (1880, 11134), (2344, 8930), (2930, 7144), (3572, 5860), (3760, 5567), (4465, 4688)]