19987875

素因数分解:

$3^2\times 5^3\times {\mathrm{109}}^1\times {\mathrm{163}}^1$

素因数の和:293

約数の個数: 48

約数和(自身を含む): 36585120

約数和(自身を除く): 16597245

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 109, 125, 163, 225, 327, 375, 489, 545, 815, 981, 1125, 1467, 1635, 2445, 2725, 4075, 4905, 7335, 8175, 12225, 13625, 17767, 20375, 24525, 36675, 40875, 53301, 61125, 88835, 122625, 159903, 183375, 266505, 444175, 799515, 1332525, 2220875, 3997575, 6662625, 19987875]

約数ペア:

[(1, 19987875), (3, 6662625), (5, 3997575), (9, 2220875), (15, 1332525), (25, 799515), (45, 444175), (75, 266505), (109, 183375), (125, 159903), (163, 122625), (225, 88835), (327, 61125), (375, 53301), (489, 40875), (545, 36675), (815, 24525), (981, 20375), (1125, 17767), (1467, 13625), (1635, 12225), (2445, 8175), (2725, 7335), (4075, 4905)]