21378357

素因数分解:

$3^3\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{113}}^1$

素因数の和:160

約数の個数: 96

約数和(自身を含む): 43666560

約数和(自身を除く): 22288203

約数列:

[1, 3, 7, 9, 11, 13, 21, 27, 33, 39, 49, 63, 77, 91, 99, 113, 117, 143, 147, 189, 231, 273, 297, 339, 351, 429, 441, 539, 637, 693, 791, 819, 1001, 1017, 1243, 1287, 1323, 1469, 1617, 1911, 2079, 2373, 2457, 3003, 3051, 3729, 3861, 4407, 4851, 5537, 5733, 7007, 7119, 8701, 9009, 10283, 11187, 13221, 14553, 16159, 16611, 17199, 21021, 21357, 26103, 27027, 30849, 33561, 39663, 48477, 49833, 60907, 63063, 71981, 78309, 92547, 113113, 145431, 149499, 182721, 189189, 215943, 234927, 277641, 339339, 436293, 548163, 647829, 791791, 1018017, 1644489, 1943487, 2375373, 3054051, 7126119, 21378357]

約数ペア:

[(1, 21378357), (3, 7126119), (7, 3054051), (9, 2375373), (11, 1943487), (13, 1644489), (21, 1018017), (27, 791791), (33, 647829), (39, 548163), (49, 436293), (63, 339339), (77, 277641), (91, 234927), (99, 215943), (113, 189189), (117, 182721), (143, 149499), (147, 145431), (189, 113113), (231, 92547), (273, 78309), (297, 71981), (339, 63063), (351, 60907), (429, 49833), (441, 48477), (539, 39663), (637, 33561), (693, 30849), (791, 27027), (819, 26103), (1001, 21357), (1017, 21021), (1243, 17199), (1287, 16611), (1323, 16159), (1469, 14553), (1617, 13221), (1911, 11187), (2079, 10283), (2373, 9009), (2457, 8701), (3003, 7119), (3051, 7007), (3729, 5733), (3861, 5537), (4407, 4851)]