20806720

素因数分解:

$2^6\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{257}}^1$

素因数の和:308

約数の個数: 112

約数和(自身を含む): 56619648

約数和(自身を除く): 35812928

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 23, 32, 40, 44, 46, 55, 64, 80, 88, 92, 110, 115, 160, 176, 184, 220, 230, 253, 257, 320, 352, 368, 440, 460, 506, 514, 704, 736, 880, 920, 1012, 1028, 1265, 1285, 1472, 1760, 1840, 2024, 2056, 2530, 2570, 2827, 3520, 3680, 4048, 4112, 5060, 5140, 5654, 5911, 7360, 8096, 8224, 10120, 10280, 11308, 11822, 14135, 16192, 16448, 20240, 20560, 22616, 23644, 28270, 29555, 40480, 41120, 45232, 47288, 56540, 59110, 65021, 80960, 82240, 90464, 94576, 113080, 118220, 130042, 180928, 189152, 226160, 236440, 260084, 325105, 378304, 452320, 472880, 520168, 650210, 904640, 945760, 1040336, 1300420, 1891520, 2080672, 2600840, 4161344, 5201680, 10403360, 20806720]

約数ペア:

[(1, 20806720), (2, 10403360), (4, 5201680), (5, 4161344), (8, 2600840), (10, 2080672), (11, 1891520), (16, 1300420), (20, 1040336), (22, 945760), (23, 904640), (32, 650210), (40, 520168), (44, 472880), (46, 452320), (55, 378304), (64, 325105), (80, 260084), (88, 236440), (92, 226160), (110, 189152), (115, 180928), (160, 130042), (176, 118220), (184, 113080), (220, 94576), (230, 90464), (253, 82240), (257, 80960), (320, 65021), (352, 59110), (368, 56540), (440, 47288), (460, 45232), (506, 41120), (514, 40480), (704, 29555), (736, 28270), (880, 23644), (920, 22616), (1012, 20560), (1028, 20240), (1265, 16448), (1285, 16192), (1472, 14135), (1760, 11822), (1840, 11308), (2024, 10280), (2056, 10120), (2530, 8224), (2570, 8096), (2827, 7360), (3520, 5911), (3680, 5654), (4048, 5140), (4112, 5060)]