19985500

素因数分解:

$2^2\times 5^3\times {\mathrm{39971}}^1$

素因数の和:39990

約数の個数: 24

約数和(自身を含む): 43649424

約数和(自身を除く): 23663924

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500, 39971, 79942, 159884, 199855, 399710, 799420, 999275, 1998550, 3997100, 4996375, 9992750, 19985500]

約数ペア:

[(1, 19985500), (2, 9992750), (4, 4996375), (5, 3997100), (10, 1998550), (20, 999275), (25, 799420), (50, 399710), (100, 199855), (125, 159884), (250, 79942), (500, 39971)]