20664725

素因数分解:

$5^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{409}}^1$

素因数の和:509

約数の個数: 24

約数和(自身を含む): 26843520

約数和(自身を除く): 6178795

約数列:

[1, 5, 25, 43, 47, 215, 235, 409, 1075, 1175, 2021, 2045, 10105, 10225, 17587, 19223, 50525, 87935, 96115, 439675, 480575, 826589, 4132945, 20664725]

約数ペア:

[(1, 20664725), (5, 4132945), (25, 826589), (43, 480575), (47, 439675), (215, 96115), (235, 87935), (409, 50525), (1075, 19223), (1175, 17587), (2021, 10225), (2045, 10105)]