18665881

素因数分解:

${\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1$

素因数の和:205

約数の個数: 24

約数和(自身を含む): 21938040

約数和(自身を除く): 3272159

約数列:

[1, 13, 17, 73, 89, 169, 221, 949, 1157, 1241, 1513, 2873, 6497, 12337, 15041, 16133, 19669, 84461, 110449, 209729, 255697, 1097993, 1435837, 18665881]

約数ペア:

[(1, 18665881), (13, 1435837), (17, 1097993), (73, 255697), (89, 209729), (169, 110449), (221, 84461), (949, 19669), (1157, 16133), (1241, 15041), (1513, 12337), (2873, 6497)]