20881904

素因数分解:

$2^4\times {\mathrm{409}}^1\times {\mathrm{3191}}^1$

素因数の和:3608

約数の個数: 20

約数和(自身を含む): 40570320

約数和(自身を除く): 19688416

約数列:

[1, 2, 4, 8, 16, 409, 818, 1636, 3191, 3272, 6382, 6544, 12764, 25528, 51056, 1305119, 2610238, 5220476, 10440952, 20881904]

約数ペア:

[(1, 20881904), (2, 10440952), (4, 5220476), (8, 2610238), (16, 1305119), (409, 51056), (818, 25528), (1636, 12764), (3191, 6544), (3272, 6382)]