20215221

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{27281}}^1$

素因数の和:27316

約数の個数: 16

約数和(自身を含む): 30555840

約数和(自身を除く): 10340619

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 27281, 81843, 354653, 518339, 1063959, 1555017, 6738407, 20215221]

約数ペア:

[(1, 20215221), (3, 6738407), (13, 1555017), (19, 1063959), (39, 518339), (57, 354653), (247, 81843), (741, 27281)]