21578167

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{439}}^1$

素因数の和:670

約数の個数: 16

約数和(自身を含む): 24640000

約数和(自身を除く): 3061833

約数列:

[1, 13, 19, 199, 247, 439, 2587, 3781, 5707, 8341, 49153, 87361, 108433, 1135693, 1659859, 21578167]

約数ペア:

[(1, 21578167), (13, 1659859), (19, 1135693), (199, 108433), (247, 87361), (439, 49153), (2587, 8341), (3781, 5707)]