20775440

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{1613}}^1$

素因数の和:1656

約数の個数: 80

約数和(自身を含む): 57639168

約数和(自身を除く): 36863728

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 460, 560, 644, 805, 920, 1288, 1610, 1613, 1840, 2576, 3220, 3226, 6440, 6452, 8065, 11291, 12880, 12904, 16130, 22582, 25808, 32260, 37099, 45164, 56455, 64520, 74198, 90328, 112910, 129040, 148396, 180656, 185495, 225820, 259693, 296792, 370990, 451640, 519386, 593584, 741980, 903280, 1038772, 1298465, 1483960, 2077544, 2596930, 2967920, 4155088, 5193860, 10387720, 20775440]

約数ペア:

[(1, 20775440), (2, 10387720), (4, 5193860), (5, 4155088), (7, 2967920), (8, 2596930), (10, 2077544), (14, 1483960), (16, 1298465), (20, 1038772), (23, 903280), (28, 741980), (35, 593584), (40, 519386), (46, 451640), (56, 370990), (70, 296792), (80, 259693), (92, 225820), (112, 185495), (115, 180656), (140, 148396), (161, 129040), (184, 112910), (230, 90328), (280, 74198), (322, 64520), (368, 56455), (460, 45164), (560, 37099), (644, 32260), (805, 25808), (920, 22582), (1288, 16130), (1610, 12904), (1613, 12880), (1840, 11291), (2576, 8065), (3220, 6452), (3226, 6440)]