391391

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1$

素因数の和:71

約数の個数: 32

約数和(自身を含む): 580608

約数和(自身を除く): 189217

約数列:

[1, 7, 11, 13, 17, 23, 77, 91, 119, 143, 161, 187, 221, 253, 299, 391, 1001, 1309, 1547, 1771, 2093, 2431, 2737, 3289, 4301, 5083, 17017, 23023, 30107, 35581, 55913, 391391]

約数ペア:

[(1, 391391), (7, 55913), (11, 35581), (13, 30107), (17, 23023), (23, 17017), (77, 5083), (91, 4301), (119, 3289), (143, 2737), (161, 2431), (187, 2093), (221, 1771), (253, 1547), (299, 1309), (391, 1001)]