990405

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{1693}}^1$

素因数の和:1717

約数の個数: 24

約数和(自身を含む): 1849848

約数和(自身を除く): 859443

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 585, 1693, 5079, 8465, 15237, 22009, 25395, 66027, 76185, 110045, 198081, 330135, 990405]

約数ペア:

[(1, 990405), (3, 330135), (5, 198081), (9, 110045), (13, 76185), (15, 66027), (39, 25395), (45, 22009), (65, 15237), (117, 8465), (195, 5079), (585, 1693)]