19975969

素因数分解:

${\mathrm{13}}^2\times {\mathrm{17}}^2\times {\mathrm{409}}^1$

素因数の和:469

約数の個数: 18

約数和(自身を含む): 23034210

約数和(自身を除く): 3058241

約数列:

[1, 13, 17, 169, 221, 289, 409, 2873, 3757, 5317, 6953, 48841, 69121, 90389, 118201, 1175057, 1536613, 19975969]

約数ペア:

[(1, 19975969), (13, 1536613), (17, 1175057), (169, 118201), (221, 90389), (289, 69121), (409, 48841), (2873, 6953), (3757, 5317)]