990386920

素因数分解:

$2^3\times 5^1\times {\mathrm{3323}}^1\times {\mathrm{7451}}^1$

素因数の和:10785

約数の個数: 32

約数和(自身を含む): 2229340320

約数和(自身を除く): 1238953400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 3323, 6646, 7451, 13292, 14902, 16615, 26584, 29804, 33230, 37255, 59608, 66460, 74510, 132920, 149020, 298040, 24759673, 49519346, 99038692, 123798365, 198077384, 247596730, 495193460, 990386920]

約数ペア:

[(1, 990386920), (2, 495193460), (4, 247596730), (5, 198077384), (8, 123798365), (10, 99038692), (20, 49519346), (40, 24759673), (3323, 298040), (6646, 149020), (7451, 132920), (13292, 74510), (14902, 66460), (16615, 59608), (26584, 37255), (29804, 33230)]