20494480

素因数分解:

$2^4\times 5^1\times {\mathrm{256181}}^1$

素因数の和:256194

約数の個数: 20

約数和(自身を含む): 47649852

約数和(自身を除く): 27155372

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 256181, 512362, 1024724, 1280905, 2049448, 2561810, 4098896, 5123620, 10247240, 20494480]

約数ペア:

[(1, 20494480), (2, 10247240), (4, 5123620), (5, 4098896), (8, 2561810), (10, 2049448), (16, 1280905), (20, 1024724), (40, 512362), (80, 256181)]