18974137

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{373}}^1$

素因数の和:449

約数の個数: 24

約数和(自身を含む): 24091584

約数和(自身を除く): 5117447

約数列:

[1, 7, 13, 43, 91, 169, 301, 373, 559, 1183, 2611, 3913, 4849, 7267, 16039, 33943, 50869, 63037, 112273, 208507, 441259, 1459549, 2710591, 18974137]

約数ペア:

[(1, 18974137), (7, 2710591), (13, 1459549), (43, 441259), (91, 208507), (169, 112273), (301, 63037), (373, 50869), (559, 33943), (1183, 16039), (2611, 7267), (3913, 4849)]