1991192240

素因数分解:

$2^4\times 5^1\times {\mathrm{24889903}}^1$

素因数の和:24889916

約数の個数: 20

約数和(自身を含む): 4629522144

約数和(自身を除く): 2638329904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 24889903, 49779806, 99559612, 124449515, 199119224, 248899030, 398238448, 497798060, 995596120, 1991192240]

約数ペア:

[(1, 1991192240), (2, 995596120), (4, 497798060), (5, 398238448), (8, 248899030), (10, 199119224), (16, 124449515), (20, 99559612), (40, 49779806), (80, 24889903)]