20704640

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{173}}^1$

素因数の和:220

約数の個数: 128

約数和(自身を含む): 57503520

約数和(自身を除く): 36798880

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 17, 20, 22, 32, 34, 40, 44, 55, 64, 68, 80, 85, 88, 110, 128, 136, 160, 170, 173, 176, 187, 220, 272, 320, 340, 346, 352, 374, 440, 544, 640, 680, 692, 704, 748, 865, 880, 935, 1088, 1360, 1384, 1408, 1496, 1730, 1760, 1870, 1903, 2176, 2720, 2768, 2941, 2992, 3460, 3520, 3740, 3806, 5440, 5536, 5882, 5984, 6920, 7040, 7480, 7612, 9515, 10880, 11072, 11764, 11968, 13840, 14705, 14960, 15224, 19030, 22144, 23528, 23936, 27680, 29410, 29920, 30448, 32351, 38060, 47056, 55360, 58820, 59840, 60896, 64702, 76120, 94112, 110720, 117640, 119680, 121792, 129404, 152240, 161755, 188224, 235280, 243584, 258808, 304480, 323510, 376448, 470560, 517616, 608960, 647020, 941120, 1035232, 1217920, 1294040, 1882240, 2070464, 2588080, 4140928, 5176160, 10352320, 20704640]

約数ペア:

[(1, 20704640), (2, 10352320), (4, 5176160), (5, 4140928), (8, 2588080), (10, 2070464), (11, 1882240), (16, 1294040), (17, 1217920), (20, 1035232), (22, 941120), (32, 647020), (34, 608960), (40, 517616), (44, 470560), (55, 376448), (64, 323510), (68, 304480), (80, 258808), (85, 243584), (88, 235280), (110, 188224), (128, 161755), (136, 152240), (160, 129404), (170, 121792), (173, 119680), (176, 117640), (187, 110720), (220, 94112), (272, 76120), (320, 64702), (340, 60896), (346, 59840), (352, 58820), (374, 55360), (440, 47056), (544, 38060), (640, 32351), (680, 30448), (692, 29920), (704, 29410), (748, 27680), (865, 23936), (880, 23528), (935, 22144), (1088, 19030), (1360, 15224), (1384, 14960), (1408, 14705), (1496, 13840), (1730, 11968), (1760, 11764), (1870, 11072), (1903, 10880), (2176, 9515), (2720, 7612), (2768, 7480), (2941, 7040), (2992, 6920), (3460, 5984), (3520, 5882), (3740, 5536), (3806, 5440)]