21658728

素因数分解:

$2^3\times 3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{211}}^1$

素因数の和:287

約数の個数: 128

約数和(自身を含む): 68382720

約数和(自身を除く): 46723992

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 13, 14, 21, 24, 26, 28, 39, 42, 47, 52, 56, 78, 84, 91, 94, 104, 141, 156, 168, 182, 188, 211, 273, 282, 312, 329, 364, 376, 422, 546, 564, 611, 633, 658, 728, 844, 987, 1092, 1128, 1222, 1266, 1316, 1477, 1688, 1833, 1974, 2184, 2444, 2532, 2632, 2743, 2954, 3666, 3948, 4277, 4431, 4888, 5064, 5486, 5908, 7332, 7896, 8229, 8554, 8862, 9917, 10972, 11816, 12831, 14664, 16458, 17108, 17724, 19201, 19834, 21944, 25662, 29751, 32916, 34216, 35448, 38402, 39668, 51324, 57603, 59502, 65832, 69419, 76804, 79336, 102648, 115206, 119004, 128921, 138838, 153608, 208257, 230412, 238008, 257842, 277676, 386763, 416514, 460824, 515684, 555352, 773526, 833028, 902447, 1031368, 1547052, 1666056, 1804894, 2707341, 3094104, 3609788, 5414682, 7219576, 10829364, 21658728]

約数ペア:

[(1, 21658728), (2, 10829364), (3, 7219576), (4, 5414682), (6, 3609788), (7, 3094104), (8, 2707341), (12, 1804894), (13, 1666056), (14, 1547052), (21, 1031368), (24, 902447), (26, 833028), (28, 773526), (39, 555352), (42, 515684), (47, 460824), (52, 416514), (56, 386763), (78, 277676), (84, 257842), (91, 238008), (94, 230412), (104, 208257), (141, 153608), (156, 138838), (168, 128921), (182, 119004), (188, 115206), (211, 102648), (273, 79336), (282, 76804), (312, 69419), (329, 65832), (364, 59502), (376, 57603), (422, 51324), (546, 39668), (564, 38402), (611, 35448), (633, 34216), (658, 32916), (728, 29751), (844, 25662), (987, 21944), (1092, 19834), (1128, 19201), (1222, 17724), (1266, 17108), (1316, 16458), (1477, 14664), (1688, 12831), (1833, 11816), (1974, 10972), (2184, 9917), (2444, 8862), (2532, 8554), (2632, 8229), (2743, 7896), (2954, 7332), (3666, 5908), (3948, 5486), (4277, 5064), (4431, 4888)]