19910621

素因数分解:

${\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{103}}^1\times {\mathrm{137}}^1$

素因数の和:340

約数の個数: 16

約数和(自身を含む): 21700224

約数和(自身を除く): 1789603

約数列:

[1, 17, 83, 103, 137, 1411, 1751, 2329, 8549, 11371, 14111, 145333, 193307, 239887, 1171213, 19910621]

約数ペア:

[(1, 19910621), (17, 1171213), (83, 239887), (103, 193307), (137, 145333), (1411, 14111), (1751, 11371), (2329, 8549)]