8505405

素因数分解:

$3^4\times 5^1\times {\mathrm{21001}}^1$

素因数の和:21018

約数の個数: 20

約数和(自身を含む): 15247452

約数和(自身を除く): 6742047

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 21001, 63003, 105005, 189009, 315015, 567027, 945045, 1701081, 2835135, 8505405]

約数ペア:

[(1, 8505405), (3, 2835135), (5, 1701081), (9, 945045), (15, 567027), (27, 315015), (45, 189009), (81, 105005), (135, 63003), (405, 21001)]