263739

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{661}}^1$

素因数の和:690

約数の個数: 16

約数和(自身を含む): 423680

約数和(自身を除く): 159941

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 661, 1983, 4627, 12559, 13881, 37677, 87913, 263739]

約数ペア:

[(1, 263739), (3, 87913), (7, 37677), (19, 13881), (21, 12559), (57, 4627), (133, 1983), (399, 661)]