18910353

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{1153}}^1$

素因数の和:1245

約数の個数: 32

約数和(自身を含む): 31905792

約数和(自身を除く): 12995439

約数列:

[1, 3, 7, 11, 21, 33, 71, 77, 213, 231, 497, 781, 1153, 1491, 2343, 3459, 5467, 8071, 12683, 16401, 24213, 38049, 81863, 88781, 245589, 266343, 573041, 900493, 1719123, 2701479, 6303451, 18910353]

約数ペア:

[(1, 18910353), (3, 6303451), (7, 2701479), (11, 1719123), (21, 900493), (33, 573041), (71, 266343), (77, 245589), (213, 88781), (231, 81863), (497, 38049), (781, 24213), (1153, 16401), (1491, 12683), (2343, 8071), (3459, 5467)]