19820475

素因数分解:

$3^2\times 5^2\times {\mathrm{137}}^1\times {\mathrm{643}}^1$

素因数の和:796

約数の個数: 36

約数和(自身を含む): 35815416

約数和(自身を除く): 15994941

約数列:

[1, 3, 5, 9, 15, 25, 45, 75, 137, 225, 411, 643, 685, 1233, 1929, 2055, 3215, 3425, 5787, 6165, 9645, 10275, 16075, 28935, 30825, 48225, 88091, 144675, 264273, 440455, 792819, 1321365, 2202275, 3964095, 6606825, 19820475]

約数ペア:

[(1, 19820475), (3, 6606825), (5, 3964095), (9, 2202275), (15, 1321365), (25, 792819), (45, 440455), (75, 264273), (137, 144675), (225, 88091), (411, 48225), (643, 30825), (685, 28935), (1233, 16075), (1929, 10275), (2055, 9645), (3215, 6165), (3425, 5787)]