19938789

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13109}}^1$

素因数の和:13141

約数の個数: 18

約数和(自身を含む): 31188690

約数和(自身を除く): 11249901

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13109, 39327, 117981, 170417, 511251, 1533753, 2215421, 6646263, 19938789]

約数ペア:

[(1, 19938789), (3, 6646263), (9, 2215421), (13, 1533753), (39, 511251), (117, 170417), (169, 117981), (507, 39327), (1521, 13109)]