20428760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{1601}}^1$

素因数の和:1652

約数の個数: 64

約数和(自身を含む): 51904800

約数和(自身を除く): 31476040

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 29, 40, 44, 55, 58, 88, 110, 116, 145, 220, 232, 290, 319, 440, 580, 638, 1160, 1276, 1595, 1601, 2552, 3190, 3202, 6380, 6404, 8005, 12760, 12808, 16010, 17611, 32020, 35222, 46429, 64040, 70444, 88055, 92858, 140888, 176110, 185716, 232145, 352220, 371432, 464290, 510719, 704440, 928580, 1021438, 1857160, 2042876, 2553595, 4085752, 5107190, 10214380, 20428760]

約数ペア:

[(1, 20428760), (2, 10214380), (4, 5107190), (5, 4085752), (8, 2553595), (10, 2042876), (11, 1857160), (20, 1021438), (22, 928580), (29, 704440), (40, 510719), (44, 464290), (55, 371432), (58, 352220), (88, 232145), (110, 185716), (116, 176110), (145, 140888), (220, 92858), (232, 88055), (290, 70444), (319, 64040), (440, 46429), (580, 35222), (638, 32020), (1160, 17611), (1276, 16010), (1595, 12808), (1601, 12760), (2552, 8005), (3190, 6404), (3202, 6380)]