81822160

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{20873}}^1$

素因数の和:20900

約数の個数: 60

約数和(自身を含む): 221306148

約数和(自身を除く): 139483988

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 80, 98, 112, 140, 196, 245, 280, 392, 490, 560, 784, 980, 1960, 3920, 20873, 41746, 83492, 104365, 146111, 166984, 208730, 292222, 333968, 417460, 584444, 730555, 834920, 1022777, 1168888, 1461110, 1669840, 2045554, 2337776, 2922220, 4091108, 5113885, 5844440, 8182216, 10227770, 11688880, 16364432, 20455540, 40911080, 81822160]

約数ペア:

[(1, 81822160), (2, 40911080), (4, 20455540), (5, 16364432), (7, 11688880), (8, 10227770), (10, 8182216), (14, 5844440), (16, 5113885), (20, 4091108), (28, 2922220), (35, 2337776), (40, 2045554), (49, 1669840), (56, 1461110), (70, 1168888), (80, 1022777), (98, 834920), (112, 730555), (140, 584444), (196, 417460), (245, 333968), (280, 292222), (392, 208730), (490, 166984), (560, 146111), (784, 104365), (980, 83492), (1960, 41746), (3920, 20873)]