18878704

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{281}}^1$

素因数の和:338

約数の個数: 80

約数和(自身を含む): 44059680

約数和(自身を除く): 25180976

約数列:

[1, 2, 4, 8, 13, 16, 17, 19, 26, 34, 38, 52, 68, 76, 104, 136, 152, 208, 221, 247, 272, 281, 304, 323, 442, 494, 562, 646, 884, 988, 1124, 1292, 1768, 1976, 2248, 2584, 3536, 3653, 3952, 4199, 4496, 4777, 5168, 5339, 7306, 8398, 9554, 10678, 14612, 16796, 19108, 21356, 29224, 33592, 38216, 42712, 58448, 62101, 67184, 69407, 76432, 85424, 90763, 124202, 138814, 181526, 248404, 277628, 363052, 496808, 555256, 726104, 993616, 1110512, 1179919, 1452208, 2359838, 4719676, 9439352, 18878704]

約数ペア:

[(1, 18878704), (2, 9439352), (4, 4719676), (8, 2359838), (13, 1452208), (16, 1179919), (17, 1110512), (19, 993616), (26, 726104), (34, 555256), (38, 496808), (52, 363052), (68, 277628), (76, 248404), (104, 181526), (136, 138814), (152, 124202), (208, 90763), (221, 85424), (247, 76432), (272, 69407), (281, 67184), (304, 62101), (323, 58448), (442, 42712), (494, 38216), (562, 33592), (646, 29224), (884, 21356), (988, 19108), (1124, 16796), (1292, 14612), (1768, 10678), (1976, 9554), (2248, 8398), (2584, 7306), (3536, 5339), (3653, 5168), (3952, 4777), (4199, 4496)]