19902080

素因数分解:

$2^7\times 5^1\times {\mathrm{11}}^2\times {\mathrm{257}}^1$

素因数の和:298

約数の個数: 96

約数和(自身を含む): 52500420

約数和(自身を除く): 32598340

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 32, 40, 44, 55, 64, 80, 88, 110, 121, 128, 160, 176, 220, 242, 257, 320, 352, 440, 484, 514, 605, 640, 704, 880, 968, 1028, 1210, 1285, 1408, 1760, 1936, 2056, 2420, 2570, 2827, 3520, 3872, 4112, 4840, 5140, 5654, 7040, 7744, 8224, 9680, 10280, 11308, 14135, 15488, 16448, 19360, 20560, 22616, 28270, 31097, 32896, 38720, 41120, 45232, 56540, 62194, 77440, 82240, 90464, 113080, 124388, 155485, 164480, 180928, 226160, 248776, 310970, 361856, 452320, 497552, 621940, 904640, 995104, 1243880, 1809280, 1990208, 2487760, 3980416, 4975520, 9951040, 19902080]

約数ペア:

[(1, 19902080), (2, 9951040), (4, 4975520), (5, 3980416), (8, 2487760), (10, 1990208), (11, 1809280), (16, 1243880), (20, 995104), (22, 904640), (32, 621940), (40, 497552), (44, 452320), (55, 361856), (64, 310970), (80, 248776), (88, 226160), (110, 180928), (121, 164480), (128, 155485), (160, 124388), (176, 113080), (220, 90464), (242, 82240), (257, 77440), (320, 62194), (352, 56540), (440, 45232), (484, 41120), (514, 38720), (605, 32896), (640, 31097), (704, 28270), (880, 22616), (968, 20560), (1028, 19360), (1210, 16448), (1285, 15488), (1408, 14135), (1760, 11308), (1936, 10280), (2056, 9680), (2420, 8224), (2570, 7744), (2827, 7040), (3520, 5654), (3872, 5140), (4112, 4840)]