20399673

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:142

約数の個数: 64

約数和(自身を含む): 35481600

約数和(自身を除く): 15081927

約数列:

[1, 3, 7, 19, 21, 29, 41, 43, 57, 87, 123, 129, 133, 203, 287, 301, 399, 551, 609, 779, 817, 861, 903, 1189, 1247, 1653, 1763, 2337, 2451, 3567, 3741, 3857, 5289, 5453, 5719, 8323, 8729, 11571, 12341, 16359, 17157, 22591, 23693, 24969, 26187, 33497, 37023, 51127, 67773, 71079, 100491, 153381, 158137, 165851, 234479, 357889, 474411, 497553, 703437, 971413, 1073667, 2914239, 6799891, 20399673]

約数ペア:

[(1, 20399673), (3, 6799891), (7, 2914239), (19, 1073667), (21, 971413), (29, 703437), (41, 497553), (43, 474411), (57, 357889), (87, 234479), (123, 165851), (129, 158137), (133, 153381), (203, 100491), (287, 71079), (301, 67773), (399, 51127), (551, 37023), (609, 33497), (779, 26187), (817, 24969), (861, 23693), (903, 22591), (1189, 17157), (1247, 16359), (1653, 12341), (1763, 11571), (2337, 8729), (2451, 8323), (3567, 5719), (3741, 5453), (3857, 5289)]