20199509525

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{4780949}}^1$

素因数の和:4780985

約数の個数: 18

約数和(自身を含む): 27122329350

約数和(自身を除く): 6922819825

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 4225, 4780949, 23904745, 62152337, 119523725, 310761685, 807980381, 1553808425, 4039901905, 20199509525]

約数ペア:

[(1, 20199509525), (5, 4039901905), (13, 1553808425), (25, 807980381), (65, 310761685), (169, 119523725), (325, 62152337), (845, 23904745), (4225, 4780949)]