20520899

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{197}}^1\times {\mathrm{647}}^1$

素因数の和:874

約数の個数: 16

約数和(自身を含む): 24634368

約数和(自身を除く): 4113469

約数列:

[1, 7, 23, 161, 197, 647, 1379, 4529, 4531, 14881, 31717, 104167, 127459, 892213, 2931557, 20520899]

約数ペア:

[(1, 20520899), (7, 2931557), (23, 892213), (161, 127459), (197, 104167), (647, 31717), (1379, 14881), (4529, 4531)]