19721581

素因数分解:

${\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{263}}^1\times {\mathrm{401}}^1$

素因数の和:692

約数の個数: 16

約数和(自身を含む): 22923648

約数和(自身を除く): 3202067

約数列:

[1, 11, 17, 187, 263, 401, 2893, 4411, 4471, 6817, 49181, 74987, 105463, 1160093, 1792871, 19721581]

約数ペア:

[(1, 19721581), (11, 1792871), (17, 1160093), (187, 105463), (263, 74987), (401, 49181), (2893, 6817), (4411, 4471)]