20943923

素因数分解:

$7^4\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1$

素因数の和:113

約数の個数: 40

約数和(自身を含む): 29175216

約数和(自身を除く): 8231293

約数列:

[1, 7, 11, 13, 49, 61, 77, 91, 143, 343, 427, 539, 637, 671, 793, 1001, 2401, 2989, 3773, 4459, 4697, 5551, 7007, 8723, 20923, 26411, 31213, 32879, 38857, 49049, 61061, 146461, 230153, 271999, 343343, 427427, 1611071, 1903993, 2991989, 20943923]

約数ペア:

[(1, 20943923), (7, 2991989), (11, 1903993), (13, 1611071), (49, 427427), (61, 343343), (77, 271999), (91, 230153), (143, 146461), (343, 61061), (427, 49049), (539, 38857), (637, 32879), (671, 31213), (793, 26411), (1001, 20923), (2401, 8723), (2989, 7007), (3773, 5551), (4459, 4697)]