20815201

素因数分解:

${\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{199}}^1\times {\mathrm{257}}^1$

素因数の和:504

約数の個数: 16

約数和(自身を含む): 23529600

約数和(自身を除く): 2714399

約数列:

[1, 11, 37, 199, 257, 407, 2189, 2827, 7363, 9509, 51143, 80993, 104599, 562573, 1892291, 20815201]

約数ペア:

[(1, 20815201), (11, 1892291), (37, 562573), (199, 104599), (257, 80993), (407, 51143), (2189, 9509), (2827, 7363)]