21399339

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{28879}}^1$

素因数の和:28914

約数の個数: 16

約数和(自身を含む): 32345600

約数和(自身を除く): 10946261

約数列:

[1, 3, 13, 19, 39, 57, 247, 741, 28879, 86637, 375427, 548701, 1126281, 1646103, 7133113, 21399339]

約数ペア:

[(1, 21399339), (3, 7133113), (13, 1646103), (19, 1126281), (39, 548701), (57, 375427), (247, 86637), (741, 28879)]