19973500

素因数分解:

$2^2\times 5^3\times {\mathrm{43}}^1\times {\mathrm{929}}^1$

素因数の和:991

約数の個数: 48

約数和(自身を含む): 44684640

約数和(自身を除く): 24711140

約数列:

[1, 2, 4, 5, 10, 20, 25, 43, 50, 86, 100, 125, 172, 215, 250, 430, 500, 860, 929, 1075, 1858, 2150, 3716, 4300, 4645, 5375, 9290, 10750, 18580, 21500, 23225, 39947, 46450, 79894, 92900, 116125, 159788, 199735, 232250, 399470, 464500, 798940, 998675, 1997350, 3994700, 4993375, 9986750, 19973500]

約数ペア:

[(1, 19973500), (2, 9986750), (4, 4993375), (5, 3994700), (10, 1997350), (20, 998675), (25, 798940), (43, 464500), (50, 399470), (86, 232250), (100, 199735), (125, 159788), (172, 116125), (215, 92900), (250, 79894), (430, 46450), (500, 39947), (860, 23225), (929, 21500), (1075, 18580), (1858, 10750), (2150, 9290), (3716, 5375), (4300, 4645)]