21379563

素因数分解:

$3^2\times {\mathrm{107}}^1\times {\mathrm{149}}^2$

素因数の和:411

約数の個数: 18

約数和(自身を含む): 31380804

約数和(自身を除く): 10001241

約数列:

[1, 3, 9, 107, 149, 321, 447, 963, 1341, 15943, 22201, 47829, 66603, 143487, 199809, 2375507, 7126521, 21379563]

約数ペア:

[(1, 21379563), (3, 7126521), (9, 2375507), (107, 199809), (149, 143487), (321, 66603), (447, 47829), (963, 22201), (1341, 15943)]