641256560

素因数分解:

$2^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{49787}}^1$

素因数の和:49830

約数の個数: 80

約数和(自身を含む): 1778029056

約数和(自身を除く): 1136772496

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 23, 28, 35, 40, 46, 56, 70, 80, 92, 112, 115, 140, 161, 184, 230, 280, 322, 368, 460, 560, 644, 805, 920, 1288, 1610, 1840, 2576, 3220, 6440, 12880, 49787, 99574, 199148, 248935, 348509, 398296, 497870, 697018, 796592, 995740, 1145101, 1394036, 1742545, 1991480, 2290202, 2788072, 3485090, 3982960, 4580404, 5576144, 5725505, 6970180, 8015707, 9160808, 11451010, 13940360, 16031414, 18321616, 22902020, 27880720, 32062828, 40078535, 45804040, 64125656, 80157070, 91608080, 128251312, 160314140, 320628280, 641256560]

約数ペア:

[(1, 641256560), (2, 320628280), (4, 160314140), (5, 128251312), (7, 91608080), (8, 80157070), (10, 64125656), (14, 45804040), (16, 40078535), (20, 32062828), (23, 27880720), (28, 22902020), (35, 18321616), (40, 16031414), (46, 13940360), (56, 11451010), (70, 9160808), (80, 8015707), (92, 6970180), (112, 5725505), (115, 5576144), (140, 4580404), (161, 3982960), (184, 3485090), (230, 2788072), (280, 2290202), (322, 1991480), (368, 1742545), (460, 1394036), (560, 1145101), (644, 995740), (805, 796592), (920, 697018), (1288, 497870), (1610, 398296), (1840, 348509), (2576, 248935), (3220, 199148), (6440, 99574), (12880, 49787)]