21251978

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{263}}^1\times {\mathrm{3673}}^1$

素因数の和:3949

約数の個数: 16

約数和(自身を含む): 34917696

約数和(自身を除く): 13665718

約数列:

[1, 2, 11, 22, 263, 526, 2893, 3673, 5786, 7346, 40403, 80806, 965999, 1931998, 10625989, 21251978]

約数ペア:

[(1, 21251978), (2, 10625989), (11, 1931998), (22, 965999), (263, 80806), (526, 40403), (2893, 7346), (3673, 5786)]