321840440

素因数分解:

$2^3\times 5^1\times {\mathrm{2011}}^1\times {\mathrm{4001}}^1$

素因数の和:6023

約数の個数: 32

約数和(自身を含む): 724682160

約数和(自身を除く): 402841720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2011, 4001, 4022, 8002, 8044, 10055, 16004, 16088, 20005, 20110, 32008, 40010, 40220, 80020, 80440, 160040, 8046011, 16092022, 32184044, 40230055, 64368088, 80460110, 160920220, 321840440]

約数ペア:

[(1, 321840440), (2, 160920220), (4, 80460110), (5, 64368088), (8, 40230055), (10, 32184044), (20, 16092022), (40, 8046011), (2011, 160040), (4001, 80440), (4022, 80020), (8002, 40220), (8044, 40010), (10055, 32008), (16004, 20110), (16088, 20005)]