20320768

素因数分解:

$2^9\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1$

素因数の和:145

約数の個数: 80

約数和(自身を含む): 45372096

約数和(自身を除く): 25051328

約数列:

[1, 2, 4, 8, 13, 16, 26, 32, 43, 52, 64, 71, 86, 104, 128, 142, 172, 208, 256, 284, 344, 416, 512, 559, 568, 688, 832, 923, 1118, 1136, 1376, 1664, 1846, 2236, 2272, 2752, 3053, 3328, 3692, 4472, 4544, 5504, 6106, 6656, 7384, 8944, 9088, 11008, 12212, 14768, 17888, 18176, 22016, 24424, 29536, 35776, 36352, 39689, 48848, 59072, 71552, 79378, 97696, 118144, 143104, 158756, 195392, 236288, 286208, 317512, 390784, 472576, 635024, 781568, 1270048, 1563136, 2540096, 5080192, 10160384, 20320768]

約数ペア:

[(1, 20320768), (2, 10160384), (4, 5080192), (8, 2540096), (13, 1563136), (16, 1270048), (26, 781568), (32, 635024), (43, 472576), (52, 390784), (64, 317512), (71, 286208), (86, 236288), (104, 195392), (128, 158756), (142, 143104), (172, 118144), (208, 97696), (256, 79378), (284, 71552), (344, 59072), (416, 48848), (512, 39689), (559, 36352), (568, 35776), (688, 29536), (832, 24424), (923, 22016), (1118, 18176), (1136, 17888), (1376, 14768), (1664, 12212), (1846, 11008), (2236, 9088), (2272, 8944), (2752, 7384), (3053, 6656), (3328, 6106), (3692, 5504), (4472, 4544)]