18842780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2089}}^1$

素因数の和:2150

約数の個数: 48

約数和(自身を含む): 44241120

約数和(自身を除く): 25398340

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 41, 44, 55, 82, 110, 164, 205, 220, 410, 451, 820, 902, 1804, 2089, 2255, 4178, 4510, 8356, 9020, 10445, 20890, 22979, 41780, 45958, 85649, 91916, 114895, 171298, 229790, 342596, 428245, 459580, 856490, 942139, 1712980, 1884278, 3768556, 4710695, 9421390, 18842780]

約数ペア:

[(1, 18842780), (2, 9421390), (4, 4710695), (5, 3768556), (10, 1884278), (11, 1712980), (20, 942139), (22, 856490), (41, 459580), (44, 428245), (55, 342596), (82, 229790), (110, 171298), (164, 114895), (205, 91916), (220, 85649), (410, 45958), (451, 41780), (820, 22979), (902, 20890), (1804, 10445), (2089, 9020), (2255, 8356), (4178, 4510)]