18520155

素因数分解:

$3^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{21661}}^1$

素因数の和:21691

約数の個数: 24

約数和(自身を含む): 33792720

約数和(自身を除く): 15272565

約数列:

[1, 3, 5, 9, 15, 19, 45, 57, 95, 171, 285, 855, 21661, 64983, 108305, 194949, 324915, 411559, 974745, 1234677, 2057795, 3704031, 6173385, 18520155]

約数ペア:

[(1, 18520155), (3, 6173385), (5, 3704031), (9, 2057795), (15, 1234677), (19, 974745), (45, 411559), (57, 324915), (95, 194949), (171, 108305), (285, 64983), (855, 21661)]