20528937

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{409}}^1$

素因数の和:455

約数の個数: 48

約数和(自身を含む): 36014400

約数和(自身を除く): 15485463

約数列:

[1, 3, 9, 11, 13, 27, 33, 39, 99, 117, 143, 169, 297, 351, 409, 429, 507, 1227, 1287, 1521, 1859, 3681, 3861, 4499, 4563, 5317, 5577, 11043, 13497, 15951, 16731, 40491, 47853, 50193, 58487, 69121, 121473, 143559, 175461, 207363, 526383, 622089, 760331, 1579149, 1866267, 2280993, 6842979, 20528937]

約数ペア:

[(1, 20528937), (3, 6842979), (9, 2280993), (11, 1866267), (13, 1579149), (27, 760331), (33, 622089), (39, 526383), (99, 207363), (117, 175461), (143, 143559), (169, 121473), (297, 69121), (351, 58487), (409, 50193), (429, 47853), (507, 40491), (1227, 16731), (1287, 15951), (1521, 13497), (1859, 11043), (3681, 5577), (3861, 5317), (4499, 4563)]