1998425

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1$

素因数の和:90

約数の個数: 36

約数和(自身を含む): 2995344

約数和(自身を除く): 996919

約数列:

[1, 5, 11, 13, 25, 43, 55, 65, 143, 169, 215, 275, 325, 473, 559, 715, 845, 1075, 1859, 2365, 2795, 3575, 4225, 6149, 7267, 9295, 11825, 13975, 30745, 36335, 46475, 79937, 153725, 181675, 399685, 1998425]

約数ペア:

[(1, 1998425), (5, 399685), (11, 181675), (13, 153725), (25, 79937), (43, 46475), (55, 36335), (65, 30745), (143, 13975), (169, 11825), (215, 9295), (275, 7267), (325, 6149), (473, 4225), (559, 3575), (715, 2795), (845, 2365), (1075, 1859)]