20787957

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{7151}}^1$

素因数の和:7193

約数の個数: 24

約数和(自身を含む): 33471360

約数和(自身を除く): 12683403

約数列:

[1, 3, 9, 17, 19, 51, 57, 153, 171, 323, 969, 2907, 7151, 21453, 64359, 121567, 135869, 364701, 407607, 1094103, 1222821, 2309773, 6929319, 20787957]

約数ペア:

[(1, 20787957), (3, 6929319), (9, 2309773), (17, 1222821), (19, 1094103), (51, 407607), (57, 364701), (153, 135869), (171, 121567), (323, 64359), (969, 21453), (2907, 7151)]