21380151

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{353}}^1\times {\mathrm{1553}}^1$

素因数の和:1922

約数の個数: 16

約数和(自身を含む): 30806496

約数和(自身を除く): 9426345

約数列:

[1, 3, 13, 39, 353, 1059, 1553, 4589, 4659, 13767, 20189, 60567, 548209, 1644627, 7126717, 21380151]

約数ペア:

[(1, 21380151), (3, 7126717), (13, 1644627), (39, 548209), (353, 60567), (1059, 20189), (1553, 13767), (4589, 4659)]