18986994

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1$

素因数の和:121

約数の個数: 128

約数和(自身を含む): 50561280

約数和(自身を除く): 31574286

約数列:

[1, 2, 3, 6, 9, 13, 17, 18, 26, 27, 34, 37, 39, 43, 51, 54, 74, 78, 86, 102, 111, 117, 129, 153, 221, 222, 234, 258, 306, 333, 351, 387, 442, 459, 481, 559, 629, 663, 666, 702, 731, 774, 918, 962, 999, 1118, 1161, 1258, 1326, 1443, 1462, 1591, 1677, 1887, 1989, 1998, 2193, 2322, 2886, 3182, 3354, 3774, 3978, 4329, 4386, 4773, 5031, 5661, 5967, 6579, 8177, 8658, 9503, 9546, 10062, 11322, 11934, 12987, 13158, 14319, 15093, 16354, 16983, 19006, 19737, 20683, 24531, 25974, 27047, 28509, 28638, 30186, 33966, 39474, 41366, 42957, 49062, 54094, 57018, 62049, 73593, 81141, 85527, 85914, 124098, 147186, 162282, 171054, 186147, 220779, 243423, 256581, 351611, 372294, 441558, 486846, 513162, 558441, 703222, 730269, 1054833, 1116882, 1460538, 2109666, 3164499, 6328998, 9493497, 18986994]

約数ペア:

[(1, 18986994), (2, 9493497), (3, 6328998), (6, 3164499), (9, 2109666), (13, 1460538), (17, 1116882), (18, 1054833), (26, 730269), (27, 703222), (34, 558441), (37, 513162), (39, 486846), (43, 441558), (51, 372294), (54, 351611), (74, 256581), (78, 243423), (86, 220779), (102, 186147), (111, 171054), (117, 162282), (129, 147186), (153, 124098), (221, 85914), (222, 85527), (234, 81141), (258, 73593), (306, 62049), (333, 57018), (351, 54094), (387, 49062), (442, 42957), (459, 41366), (481, 39474), (559, 33966), (629, 30186), (663, 28638), (666, 28509), (702, 27047), (731, 25974), (774, 24531), (918, 20683), (962, 19737), (999, 19006), (1118, 16983), (1161, 16354), (1258, 15093), (1326, 14319), (1443, 13158), (1462, 12987), (1591, 11934), (1677, 11322), (1887, 10062), (1989, 9546), (1998, 9503), (2193, 8658), (2322, 8177), (2886, 6579), (3182, 5967), (3354, 5661), (3774, 5031), (3978, 4773), (4329, 4386)]