199980280

素因数分解:

$2^3\times 5^1\times {\mathrm{4999507}}^1$

素因数の和:4999518

約数の個数: 16

約数和(自身を含む): 449955720

約数和(自身を除く): 249975440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 4999507, 9999014, 19998028, 24997535, 39996056, 49995070, 99990140, 199980280]

約数ペア:

[(1, 199980280), (2, 99990140), (4, 49995070), (5, 39996056), (8, 24997535), (10, 19998028), (20, 9999014), (40, 4999507)]