19991181

素因数分解:

$3^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{6389}}^1$

素因数の和:6548

約数の個数: 16

約数和(自身を含む): 30672000

約数和(自身を除く): 10680819

約数列:

[1, 3, 7, 21, 149, 447, 1043, 3129, 6389, 19167, 44723, 134169, 951961, 2855883, 6663727, 19991181]

約数ペア:

[(1, 19991181), (3, 6663727), (7, 2855883), (21, 951961), (149, 134169), (447, 44723), (1043, 19167), (3129, 6389)]