20809893

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{12409}}^1$

素因数の和:12468

約数の個数: 16

約数和(自身を含む): 30578240

約数和(自身を除く): 9768347

約数列:

[1, 3, 13, 39, 43, 129, 559, 1677, 12409, 37227, 161317, 483951, 533587, 1600761, 6936631, 20809893]

約数ペア:

[(1, 20809893), (3, 6936631), (13, 1600761), (39, 533587), (43, 483951), (129, 161317), (559, 37227), (1677, 12409)]