18688865

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{1301}}^1$

素因数の和:1349

約数の個数: 24

約数和(自身を含む): 25732728

約数和(自身を除く): 7043863

約数列:

[1, 5, 13, 17, 65, 85, 169, 221, 845, 1105, 1301, 2873, 6505, 14365, 16913, 22117, 84565, 110585, 219869, 287521, 1099345, 1437605, 3737773, 18688865]

約数ペア:

[(1, 18688865), (5, 3737773), (13, 1437605), (17, 1099345), (65, 287521), (85, 219869), (169, 110585), (221, 84565), (845, 22117), (1105, 16913), (1301, 14365), (2873, 6505)]