21720439

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{1871}}^1$

素因数の和:1950

約数の個数: 16

約数和(自身を含む): 25159680

約数和(自身を除く): 3439241

約数列:

[1, 13, 19, 47, 247, 611, 893, 1871, 11609, 24323, 35549, 87937, 462137, 1143181, 1670803, 21720439]

約数ペア:

[(1, 21720439), (13, 1670803), (19, 1143181), (47, 462137), (247, 87937), (611, 35549), (893, 24323), (1871, 11609)]