18941279

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{191}}^1\times {\mathrm{457}}^1$

素因数の和:686

約数の個数: 16

約数和(自身を含む): 22511616

約数和(自身を除く): 3570337

約数列:

[1, 7, 31, 191, 217, 457, 1337, 3199, 5921, 14167, 41447, 87287, 99169, 611009, 2705897, 18941279]

約数ペア:

[(1, 18941279), (7, 2705897), (31, 611009), (191, 99169), (217, 87287), (457, 41447), (1337, 14167), (3199, 5921)]