21307689

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{14009}}^1$

素因数の和:14041

約数の個数: 18

約数和(自身を含む): 33329790

約数和(自身を除く): 12022101

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 14009, 42027, 126081, 182117, 546351, 1639053, 2367521, 7102563, 21307689]

約数ペア:

[(1, 21307689), (3, 7102563), (9, 2367521), (13, 1639053), (39, 546351), (117, 182117), (169, 126081), (507, 42027), (1521, 14009)]