821491

素因数分解:

${\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{191}}^1$

素因数の和:242

約数の個数: 16

約数和(自身を含む): 995328

約数和(自身を除く): 173837

約数列:

[1, 11, 17, 23, 187, 191, 253, 391, 2101, 3247, 4301, 4393, 35717, 48323, 74681, 821491]

約数ペア:

[(1, 821491), (11, 74681), (17, 48323), (23, 35717), (187, 4393), (191, 4301), (253, 3247), (391, 2101)]