20521605

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{105239}}^1$

素因数の和:105260

約数の個数: 16

約数和(自身を含む): 35360640

約数和(自身を除く): 14839035

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 105239, 315717, 526195, 1368107, 1578585, 4104321, 6840535, 20521605]

約数ペア:

[(1, 20521605), (3, 6840535), (5, 4104321), (13, 1578585), (15, 1368107), (39, 526195), (65, 315717), (195, 105239)]