21190689

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{1303}}^1$

素因数の和:1461

約数の個数: 24

約数和(自身を含む): 33225920

約数和(自身を除く): 12035231

約数列:

[1, 3, 9, 13, 39, 117, 139, 417, 1251, 1303, 1807, 3909, 5421, 11727, 16263, 16939, 50817, 152451, 181117, 543351, 1630053, 2354521, 7063563, 21190689]

約数ペア:

[(1, 21190689), (3, 7063563), (9, 2354521), (13, 1630053), (39, 543351), (117, 181117), (139, 152451), (417, 50817), (1251, 16939), (1303, 16263), (1807, 11727), (3909, 5421)]