21164952008

素因数分解:

$2^3\times {\mathrm{2081}}^1\times {\mathrm{1271321}}^1$

素因数の和:1273408

約数の個数: 16

約数和(自身を含む): 39703386060

約数和(自身を除く): 18538434052

約数列:

[1, 2, 4, 8, 2081, 4162, 8324, 16648, 1271321, 2542642, 5085284, 10170568, 2645619001, 5291238002, 10582476004, 21164952008]

約数ペア:

[(1, 21164952008), (2, 10582476004), (4, 5291238002), (8, 2645619001), (2081, 10170568), (4162, 5085284), (8324, 2542642), (16648, 1271321)]