18117980

素因数分解:

$2^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{8311}}^1$

素因数の和:8429

約数の個数: 24

約数和(自身を含む): 38401440

約数和(自身を除く): 20283460

約数列:

[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 8311, 16622, 33244, 41555, 83110, 166220, 905899, 1811798, 3623596, 4529495, 9058990, 18117980]

約数ペア:

[(1, 18117980), (2, 9058990), (4, 4529495), (5, 3623596), (10, 1811798), (20, 905899), (109, 166220), (218, 83110), (436, 41555), (545, 33244), (1090, 16622), (2180, 8311)]