17820018

素因数分解:

$2^1\times 3^2\times {\mathrm{990001}}^1$

素因数の和:990009

約数の個数: 12

約数和(自身を含む): 38610078

約数和(自身を除く): 20790060

約数列:

[1, 2, 3, 6, 9, 18, 990001, 1980002, 2970003, 5940006, 8910009, 17820018]

約数ペア:

[(1, 17820018), (2, 8910009), (3, 5940006), (6, 2970003), (9, 1980002), (18, 990001)]