640908961

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{12479}}^1$

素因数の和:12549

約数の個数: 32

約数和(自身を含む): 862617600

約数和(自身を除く): 221708639

約数列:

[1, 7, 11, 23, 29, 77, 161, 203, 253, 319, 667, 1771, 2233, 4669, 7337, 12479, 51359, 87353, 137269, 287017, 361891, 960883, 2009119, 2533237, 3157187, 3980801, 8323493, 22100309, 27865607, 58264451, 91558423, 640908961]

約数ペア:

[(1, 640908961), (7, 91558423), (11, 58264451), (23, 27865607), (29, 22100309), (77, 8323493), (161, 3980801), (203, 3157187), (253, 2533237), (319, 2009119), (667, 960883), (1771, 361891), (2233, 287017), (4669, 137269), (7337, 87353), (12479, 51359)]