20809828

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{2011}}^1$

素因数の和:2227

約数の個数: 24

約数和(自身を含む): 39435200

約数和(自身を除く): 18625372

約数列:

[1, 2, 4, 13, 26, 52, 199, 398, 796, 2011, 2587, 4022, 5174, 8044, 10348, 26143, 52286, 104572, 400189, 800378, 1600756, 5202457, 10404914, 20809828]

約数ペア:

[(1, 20809828), (2, 10404914), (4, 5202457), (13, 1600756), (26, 800378), (52, 400189), (199, 104572), (398, 52286), (796, 26143), (2011, 10348), (2587, 8044), (4022, 5174)]