8900020

素因数分解:

$2^2\times 5^1\times {\mathrm{445001}}^1$

素因数の和:445010

約数の個数: 12

約数和(自身を含む): 18690084

約数和(自身を除く): 9790064

約数列:

[1, 2, 4, 5, 10, 20, 445001, 890002, 1780004, 2225005, 4450010, 8900020]

約数ペア:

[(1, 8900020), (2, 4450010), (4, 2225005), (5, 1780004), (10, 890002), (20, 445001)]