20128805

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{131}}^1\times {\mathrm{389}}^1$

素因数の和:604

約数の個数: 16

約数和(自身を含む): 24710400

約数和(自身を除く): 4581595

約数列:

[1, 5, 79, 131, 389, 395, 655, 1945, 10349, 30731, 50959, 51745, 153655, 254795, 4025761, 20128805]

約数ペア:

[(1, 20128805), (5, 4025761), (79, 254795), (131, 153655), (389, 51745), (395, 50959), (655, 30731), (1945, 10349)]