81307840

素因数分解:

$2^6\times 5^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{311}}^1$

素因数の和:390

約数の個数: 112

約数和(自身を含む): 209214720

約数和(自身を除く): 127906880

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 43, 64, 76, 80, 86, 95, 152, 160, 172, 190, 215, 304, 311, 320, 344, 380, 430, 608, 622, 688, 760, 817, 860, 1216, 1244, 1376, 1520, 1555, 1634, 1720, 2488, 2752, 3040, 3110, 3268, 3440, 4085, 4976, 5909, 6080, 6220, 6536, 6880, 8170, 9952, 11818, 12440, 13072, 13373, 13760, 16340, 19904, 23636, 24880, 26144, 26746, 29545, 32680, 47272, 49760, 52288, 53492, 59090, 65360, 66865, 94544, 99520, 106984, 118180, 130720, 133730, 189088, 213968, 236360, 254087, 261440, 267460, 378176, 427936, 472720, 508174, 534920, 855872, 945440, 1016348, 1069840, 1270435, 1890880, 2032696, 2139680, 2540870, 4065392, 4279360, 5081740, 8130784, 10163480, 16261568, 20326960, 40653920, 81307840]

約数ペア:

[(1, 81307840), (2, 40653920), (4, 20326960), (5, 16261568), (8, 10163480), (10, 8130784), (16, 5081740), (19, 4279360), (20, 4065392), (32, 2540870), (38, 2139680), (40, 2032696), (43, 1890880), (64, 1270435), (76, 1069840), (80, 1016348), (86, 945440), (95, 855872), (152, 534920), (160, 508174), (172, 472720), (190, 427936), (215, 378176), (304, 267460), (311, 261440), (320, 254087), (344, 236360), (380, 213968), (430, 189088), (608, 133730), (622, 130720), (688, 118180), (760, 106984), (817, 99520), (860, 94544), (1216, 66865), (1244, 65360), (1376, 59090), (1520, 53492), (1555, 52288), (1634, 49760), (1720, 47272), (2488, 32680), (2752, 29545), (3040, 26746), (3110, 26144), (3268, 24880), (3440, 23636), (4085, 19904), (4976, 16340), (5909, 13760), (6080, 13373), (6220, 13072), (6536, 12440), (6880, 11818), (8170, 9952)]