20904808

素因数分解:

$2^3\times {\mathrm{409}}^1\times {\mathrm{6389}}^1$

素因数の和:6804

約数の個数: 16

約数和(自身を含む): 39298500

約数和(自身を除く): 18393692

約数列:

[1, 2, 4, 8, 409, 818, 1636, 3272, 6389, 12778, 25556, 51112, 2613101, 5226202, 10452404, 20904808]

約数ペア:

[(1, 20904808), (2, 10452404), (4, 5226202), (8, 2613101), (409, 51112), (818, 25556), (1636, 12778), (3272, 6389)]