20905407

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{67}}^1\times {\mathrm{937}}^1$

素因数の和:1047

約数の個数: 24

約数和(自身を含む): 31509296

約数和(自身を除く): 10603889

約数列:

[1, 3, 9, 37, 67, 111, 201, 333, 603, 937, 2479, 2811, 7437, 8433, 22311, 34669, 62779, 104007, 188337, 312021, 565011, 2322823, 6968469, 20905407]

約数ペア:

[(1, 20905407), (3, 6968469), (9, 2322823), (37, 565011), (67, 312021), (111, 188337), (201, 104007), (333, 62779), (603, 34669), (937, 22311), (2479, 8433), (2811, 7437)]