20891222

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{53}}^1$

素因数の和:149

約数の個数: 64

約数和(自身を含む): 39191040

約数和(自身を除く): 18299818

約数列:

[1, 2, 11, 19, 22, 23, 38, 41, 46, 53, 82, 106, 209, 253, 418, 437, 451, 506, 583, 779, 874, 902, 943, 1007, 1166, 1219, 1558, 1886, 2014, 2173, 2438, 4346, 4807, 8569, 9614, 10373, 11077, 13409, 17138, 17917, 20746, 22154, 23161, 23903, 26818, 35834, 41287, 46322, 47806, 49979, 82574, 99958, 197087, 254771, 394174, 454157, 509542, 549769, 908314, 949601, 1099538, 1899202, 10445611, 20891222]

約数ペア:

[(1, 20891222), (2, 10445611), (11, 1899202), (19, 1099538), (22, 949601), (23, 908314), (38, 549769), (41, 509542), (46, 454157), (53, 394174), (82, 254771), (106, 197087), (209, 99958), (253, 82574), (418, 49979), (437, 47806), (451, 46322), (506, 41287), (583, 35834), (779, 26818), (874, 23903), (902, 23161), (943, 22154), (1007, 20746), (1166, 17917), (1219, 17138), (1558, 13409), (1886, 11077), (2014, 10373), (2173, 9614), (2438, 8569), (4346, 4807)]