20890353

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{263}}^1$

素因数の和:389

約数の個数: 32

約数和(自身を含む): 31933440

約数和(自身を除く): 11043087

約数列:

[1, 3, 11, 29, 33, 83, 87, 249, 263, 319, 789, 913, 957, 2407, 2739, 2893, 7221, 7627, 8679, 21829, 22881, 26477, 65487, 79431, 83897, 240119, 251691, 633041, 720357, 1899123, 6963451, 20890353]

約数ペア:

[(1, 20890353), (3, 6963451), (11, 1899123), (29, 720357), (33, 633041), (83, 251691), (87, 240119), (249, 83897), (263, 79431), (319, 65487), (789, 26477), (913, 22881), (957, 21829), (2407, 8679), (2739, 7627), (2893, 7221)]