19936004

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{257}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 40049856

約数和(自身を除く): 20113852

約数列:

[1, 2, 4, 11, 22, 41, 43, 44, 82, 86, 164, 172, 257, 451, 473, 514, 902, 946, 1028, 1763, 1804, 1892, 2827, 3526, 5654, 7052, 10537, 11051, 11308, 19393, 21074, 22102, 38786, 42148, 44204, 77572, 115907, 121561, 231814, 243122, 453091, 463628, 486244, 906182, 1812364, 4984001, 9968002, 19936004]

約数ペア:

[(1, 19936004), (2, 9968002), (4, 4984001), (11, 1812364), (22, 906182), (41, 486244), (43, 463628), (44, 453091), (82, 243122), (86, 231814), (164, 121561), (172, 115907), (257, 77572), (451, 44204), (473, 42148), (514, 38786), (902, 22102), (946, 21074), (1028, 19393), (1763, 11308), (1804, 11051), (1892, 10537), (2827, 7052), (3526, 5654)]