128611825

素因数分解:

$5^2\times {\mathrm{109}}^2\times {\mathrm{433}}^1$

素因数の和:661

約数の個数: 18

約数和(自身を含む): 161326914

約数和(自身を除く): 32715089

約数列:

[1, 5, 25, 109, 433, 545, 2165, 2725, 10825, 11881, 47197, 59405, 235985, 297025, 1179925, 5144473, 25722365, 128611825]

約数ペア:

[(1, 128611825), (5, 25722365), (25, 5144473), (109, 1179925), (433, 297025), (545, 235985), (2165, 59405), (2725, 47197), (10825, 11881)]