21258866

素因数分解:

$2^1\times {\mathrm{61}}^1\times {\mathrm{271}}^1\times {\mathrm{643}}^1$

素因数の和:977

約数の個数: 16

約数和(自身を含む): 32581248

約数和(自身を除く): 11322382

約数列:

[1, 2, 61, 122, 271, 542, 643, 1286, 16531, 33062, 39223, 78446, 174253, 348506, 10629433, 21258866]

約数ペア:

[(1, 21258866), (2, 10629433), (61, 348506), (122, 174253), (271, 78446), (542, 39223), (643, 33062), (1286, 16531)]