1666971520

素因数分解:

$2^7\times 5^1\times {\mathrm{127}}^1\times {\mathrm{20509}}^1$

素因数の和:20655

約数の個数: 64

約数和(自身を含む): 4016678400

約数和(自身を除く): 2349706880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 160, 254, 320, 508, 635, 640, 1016, 1270, 2032, 2540, 4064, 5080, 8128, 10160, 16256, 20320, 20509, 40640, 41018, 81280, 82036, 102545, 164072, 205090, 328144, 410180, 656288, 820360, 1312576, 1640720, 2604643, 2625152, 3281440, 5209286, 6562880, 10418572, 13023215, 13125760, 20837144, 26046430, 41674288, 52092860, 83348576, 104185720, 166697152, 208371440, 333394304, 416742880, 833485760, 1666971520]

約数ペア:

[(1, 1666971520), (2, 833485760), (4, 416742880), (5, 333394304), (8, 208371440), (10, 166697152), (16, 104185720), (20, 83348576), (32, 52092860), (40, 41674288), (64, 26046430), (80, 20837144), (127, 13125760), (128, 13023215), (160, 10418572), (254, 6562880), (320, 5209286), (508, 3281440), (635, 2625152), (640, 2604643), (1016, 1640720), (1270, 1312576), (2032, 820360), (2540, 656288), (4064, 410180), (5080, 328144), (8128, 205090), (10160, 164072), (16256, 102545), (20320, 82036), (20509, 81280), (40640, 41018)]