81431168

素因数分解:

$2^7\times 7^1\times {\mathrm{13}}^1\times {\mathrm{6991}}^1$

素因数の和:7025

約数の個数: 64

約数和(自身を含む): 199691520

約数和(自身を除く): 118260352

約数列:

[1, 2, 4, 7, 8, 13, 14, 16, 26, 28, 32, 52, 56, 64, 91, 104, 112, 128, 182, 208, 224, 364, 416, 448, 728, 832, 896, 1456, 1664, 2912, 5824, 6991, 11648, 13982, 27964, 48937, 55928, 90883, 97874, 111856, 181766, 195748, 223712, 363532, 391496, 447424, 636181, 727064, 782992, 894848, 1272362, 1454128, 1565984, 2544724, 2908256, 3131968, 5089448, 5816512, 6263936, 10178896, 11633024, 20357792, 40715584, 81431168]

約数ペア:

[(1, 81431168), (2, 40715584), (4, 20357792), (7, 11633024), (8, 10178896), (13, 6263936), (14, 5816512), (16, 5089448), (26, 3131968), (28, 2908256), (32, 2544724), (52, 1565984), (56, 1454128), (64, 1272362), (91, 894848), (104, 782992), (112, 727064), (128, 636181), (182, 447424), (208, 391496), (224, 363532), (364, 223712), (416, 195748), (448, 181766), (728, 111856), (832, 97874), (896, 90883), (1456, 55928), (1664, 48937), (2912, 27964), (5824, 13982), (6991, 11648)]