21998042

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{90901}}^1$

素因数の和:90925

約数の個数: 12

約数和(自身を含む): 36269898

約数和(自身を除く): 14271856

約数列:

[1, 2, 11, 22, 121, 242, 90901, 181802, 999911, 1999822, 10999021, 21998042]

約数ペア:

[(1, 21998042), (2, 10999021), (11, 1999822), (22, 999911), (121, 181802), (242, 90901)]