19928307

素因数分解:

$3^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{761}}^1$

素因数の和:843

約数の個数: 32

約数和(自身を含む): 32186880

約数和(自身を除く): 12258573

約数列:

[1, 3, 7, 21, 29, 43, 87, 129, 203, 301, 609, 761, 903, 1247, 2283, 3741, 5327, 8729, 15981, 22069, 26187, 32723, 66207, 98169, 154483, 229061, 463449, 687183, 948967, 2846901, 6642769, 19928307]

約数ペア:

[(1, 19928307), (3, 6642769), (7, 2846901), (21, 948967), (29, 687183), (43, 463449), (87, 229061), (129, 154483), (203, 98169), (301, 66207), (609, 32723), (761, 26187), (903, 22069), (1247, 15981), (2283, 8729), (3741, 5327)]