19905105

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^3\times {\mathrm{997}}^1$

素因数の和:1038

約数の個数: 32

約数和(自身を含む): 35065728

約数和(自身を除く): 15160623

約数列:

[1, 3, 5, 11, 15, 33, 55, 121, 165, 363, 605, 997, 1331, 1815, 2991, 3993, 4985, 6655, 10967, 14955, 19965, 32901, 54835, 120637, 164505, 361911, 603185, 1327007, 1809555, 3981021, 6635035, 19905105]

約数ペア:

[(1, 19905105), (3, 6635035), (5, 3981021), (11, 1809555), (15, 1327007), (33, 603185), (55, 361911), (121, 164505), (165, 120637), (363, 54835), (605, 32901), (997, 19965), (1331, 14955), (1815, 10967), (2991, 6655), (3993, 4985)]