20389468

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{103}}^1\times {\mathrm{409}}^1$

素因数の和:538

約数の個数: 36

約数和(自身を含む): 39697840

約数和(自身を除く): 19308372

約数列:

[1, 2, 4, 11, 22, 44, 103, 121, 206, 242, 409, 412, 484, 818, 1133, 1636, 2266, 4499, 4532, 8998, 12463, 17996, 24926, 42127, 49489, 49852, 84254, 98978, 168508, 197956, 463397, 926794, 1853588, 5097367, 10194734, 20389468]

約数ペア:

[(1, 20389468), (2, 10194734), (4, 5097367), (11, 1853588), (22, 926794), (44, 463397), (103, 197956), (121, 168508), (206, 98978), (242, 84254), (409, 49852), (412, 49489), (484, 42127), (818, 24926), (1133, 17996), (1636, 12463), (2266, 8998), (4499, 4532)]