20921251

素因数分解:

${\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{97}}^1\times {\mathrm{353}}^1$

素因数の和:510

約数の個数: 16

約数和(自身を含む): 23313024

約数和(自身を除く): 2391773

約数列:

[1, 13, 47, 97, 353, 611, 1261, 4559, 4589, 16591, 34241, 59267, 215683, 445133, 1609327, 20921251]

約数ペア:

[(1, 20921251), (13, 1609327), (47, 445133), (97, 215683), (353, 59267), (611, 34241), (1261, 16591), (4559, 4589)]