21028161

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1$

素因数の和:166

約数の個数: 64

約数和(自身を含む): 37509120

約数和(自身を除く): 16480959

約数列:

[1, 3, 7, 11, 21, 29, 33, 43, 73, 77, 87, 129, 203, 219, 231, 301, 319, 473, 511, 609, 803, 903, 957, 1247, 1419, 1533, 2117, 2233, 2409, 3139, 3311, 3741, 5621, 6351, 6699, 8729, 9417, 9933, 13717, 14819, 16863, 21973, 23287, 26187, 34529, 41151, 44457, 65919, 69861, 91031, 96019, 103587, 163009, 241703, 273093, 288057, 489027, 637217, 725109, 1001341, 1911651, 3004023, 7009387, 21028161]

約数ペア:

[(1, 21028161), (3, 7009387), (7, 3004023), (11, 1911651), (21, 1001341), (29, 725109), (33, 637217), (43, 489027), (73, 288057), (77, 273093), (87, 241703), (129, 163009), (203, 103587), (219, 96019), (231, 91031), (301, 69861), (319, 65919), (473, 44457), (511, 41151), (609, 34529), (803, 26187), (903, 23287), (957, 21973), (1247, 16863), (1419, 14819), (1533, 13717), (2117, 9933), (2233, 9417), (2409, 8729), (3139, 6699), (3311, 6351), (3741, 5621)]