21154809

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{28549}}^1$

素因数の和:28584

約数の個数: 16

約数和(自身を含む): 31976000

約数和(自身を除く): 10821191

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 28549, 85647, 371137, 542431, 1113411, 1627293, 7051603, 21154809]

約数ペア:

[(1, 21154809), (3, 7051603), (13, 1627293), (19, 1113411), (39, 542431), (57, 371137), (247, 85647), (741, 28549)]