21781201

素因数分解:

${\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{541}}^1$

素因数の和:736

約数の個数: 16

約数和(自身を含む): 24888640

約数和(自身を除く): 3107439

約数列:

[1, 13, 19, 163, 247, 541, 2119, 3097, 7033, 10279, 40261, 88183, 133627, 1146379, 1675477, 21781201]

約数ペア:

[(1, 21781201), (13, 1675477), (19, 1146379), (163, 133627), (247, 88183), (541, 40261), (2119, 10279), (3097, 7033)]