81419440

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{241}}^1$

素因数の和:398

約数の個数: 80

約数和(自身を含む): 196612416

約数和(自身を除く): 115192976

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 103, 164, 205, 206, 241, 328, 410, 412, 482, 515, 656, 820, 824, 964, 1030, 1205, 1640, 1648, 1928, 2060, 2410, 3280, 3856, 4120, 4223, 4820, 8240, 8446, 9640, 9881, 16892, 19280, 19762, 21115, 24823, 33784, 39524, 42230, 49405, 49646, 67568, 79048, 84460, 98810, 99292, 124115, 158096, 168920, 197620, 198584, 248230, 337840, 395240, 397168, 496460, 790480, 992920, 1017743, 1985840, 2035486, 4070972, 5088715, 8141944, 10177430, 16283888, 20354860, 40709720, 81419440]

約数ペア:

[(1, 81419440), (2, 40709720), (4, 20354860), (5, 16283888), (8, 10177430), (10, 8141944), (16, 5088715), (20, 4070972), (40, 2035486), (41, 1985840), (80, 1017743), (82, 992920), (103, 790480), (164, 496460), (205, 397168), (206, 395240), (241, 337840), (328, 248230), (410, 198584), (412, 197620), (482, 168920), (515, 158096), (656, 124115), (820, 99292), (824, 98810), (964, 84460), (1030, 79048), (1205, 67568), (1640, 49646), (1648, 49405), (1928, 42230), (2060, 39524), (2410, 33784), (3280, 24823), (3856, 21115), (4120, 19762), (4223, 19280), (4820, 16892), (8240, 9881), (8446, 9640)]