18156621

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{20107}}^1$

素因数の和:20160

約数の個数: 16

約数和(自身を含む): 28312064

約数和(自身を除く): 10155443

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 20107, 60321, 140749, 422247, 864601, 2593803, 6052207, 18156621]

約数ペア:

[(1, 18156621), (3, 6052207), (7, 2593803), (21, 864601), (43, 422247), (129, 140749), (301, 60321), (903, 20107)]