81681040

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{311}}^1$

素因数の和:405

約数の個数: 120

約数和(自身を含む): 224932032

約数和(自身を除く): 143250992

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 67, 70, 80, 98, 112, 134, 140, 196, 245, 268, 280, 311, 335, 392, 469, 490, 536, 560, 622, 670, 784, 938, 980, 1072, 1244, 1340, 1555, 1876, 1960, 2177, 2345, 2488, 2680, 3110, 3283, 3752, 3920, 4354, 4690, 4976, 5360, 6220, 6566, 7504, 8708, 9380, 10885, 12440, 13132, 15239, 16415, 17416, 18760, 20837, 21770, 24880, 26264, 30478, 32830, 34832, 37520, 41674, 43540, 52528, 60956, 65660, 76195, 83348, 87080, 104185, 121912, 131320, 145859, 152390, 166696, 174160, 208370, 243824, 262640, 291718, 304780, 333392, 416740, 583436, 609560, 729295, 833480, 1021013, 1166872, 1219120, 1458590, 1666960, 2042026, 2333744, 2917180, 4084052, 5105065, 5834360, 8168104, 10210130, 11668720, 16336208, 20420260, 40840520, 81681040]

約数ペア:

[(1, 81681040), (2, 40840520), (4, 20420260), (5, 16336208), (7, 11668720), (8, 10210130), (10, 8168104), (14, 5834360), (16, 5105065), (20, 4084052), (28, 2917180), (35, 2333744), (40, 2042026), (49, 1666960), (56, 1458590), (67, 1219120), (70, 1166872), (80, 1021013), (98, 833480), (112, 729295), (134, 609560), (140, 583436), (196, 416740), (245, 333392), (268, 304780), (280, 291718), (311, 262640), (335, 243824), (392, 208370), (469, 174160), (490, 166696), (536, 152390), (560, 145859), (622, 131320), (670, 121912), (784, 104185), (938, 87080), (980, 83348), (1072, 76195), (1244, 65660), (1340, 60956), (1555, 52528), (1876, 43540), (1960, 41674), (2177, 37520), (2345, 34832), (2488, 32830), (2680, 30478), (3110, 26264), (3283, 24880), (3752, 21770), (3920, 20837), (4354, 18760), (4690, 17416), (4976, 16415), (5360, 15239), (6220, 13132), (6566, 12440), (7504, 10885), (8708, 9380)]