21305555

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{1637}}^1$

素因数の和:1798

約数の個数: 16

約数和(自身を含む): 27125280

約数和(自身を除く): 5819725

約数列:

[1, 5, 19, 95, 137, 685, 1637, 2603, 8185, 13015, 31103, 155515, 224269, 1121345, 4261111, 21305555]

約数ペア:

[(1, 21305555), (5, 4261111), (19, 1121345), (95, 224269), (137, 155515), (685, 31103), (1637, 13015), (2603, 8185)]