20181800

素因数分解:

$2^3\times 5^2\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{113}}^1$

素因数の和:195

約数の個数: 96

約数和(自身を含む): 50889600

約数和(自身を除く): 30707800

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 25, 38, 40, 47, 50, 76, 94, 95, 100, 113, 152, 188, 190, 200, 226, 235, 376, 380, 452, 470, 475, 565, 760, 893, 904, 940, 950, 1130, 1175, 1786, 1880, 1900, 2147, 2260, 2350, 2825, 3572, 3800, 4294, 4465, 4520, 4700, 5311, 5650, 7144, 8588, 8930, 9400, 10622, 10735, 11300, 17176, 17860, 21244, 21470, 22325, 22600, 26555, 35720, 42488, 42940, 44650, 53110, 53675, 85880, 89300, 100909, 106220, 107350, 132775, 178600, 201818, 212440, 214700, 265550, 403636, 429400, 504545, 531100, 807272, 1009090, 1062200, 2018180, 2522725, 4036360, 5045450, 10090900, 20181800]

約数ペア:

[(1, 20181800), (2, 10090900), (4, 5045450), (5, 4036360), (8, 2522725), (10, 2018180), (19, 1062200), (20, 1009090), (25, 807272), (38, 531100), (40, 504545), (47, 429400), (50, 403636), (76, 265550), (94, 214700), (95, 212440), (100, 201818), (113, 178600), (152, 132775), (188, 107350), (190, 106220), (200, 100909), (226, 89300), (235, 85880), (376, 53675), (380, 53110), (452, 44650), (470, 42940), (475, 42488), (565, 35720), (760, 26555), (893, 22600), (904, 22325), (940, 21470), (950, 21244), (1130, 17860), (1175, 17176), (1786, 11300), (1880, 10735), (1900, 10622), (2147, 9400), (2260, 8930), (2350, 8588), (2825, 7144), (3572, 5650), (3800, 5311), (4294, 4700), (4465, 4520)]