21256233

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{3109}}^1$

素因数の和:3208

約数の個数: 16

約数和(自身を含む): 29557440

約数和(自身を除く): 8301207

約数列:

[1, 3, 43, 53, 129, 159, 2279, 3109, 6837, 9327, 133687, 164777, 401061, 494331, 7085411, 21256233]

約数ペア:

[(1, 21256233), (3, 7085411), (43, 494331), (53, 401061), (129, 164777), (159, 133687), (2279, 9327), (3109, 6837)]