21054891

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2887}}^1$

素因数の和:2931

約数の個数: 32

約数和(自身を含む): 34933248

約数和(自身を除く): 13878357

約数列:

[1, 3, 11, 13, 17, 33, 39, 51, 143, 187, 221, 429, 561, 663, 2431, 2887, 7293, 8661, 31757, 37531, 49079, 95271, 112593, 147237, 412841, 539869, 638027, 1238523, 1619607, 1914081, 7018297, 21054891]

約数ペア:

[(1, 21054891), (3, 7018297), (11, 1914081), (13, 1619607), (17, 1238523), (33, 638027), (39, 539869), (51, 412841), (143, 147237), (187, 112593), (221, 95271), (429, 49079), (561, 37531), (663, 31757), (2431, 8661), (2887, 7293)]