21056978

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{3719}}^1$

素因数の和:3889

約数の個数: 16

約数和(自身を含む): 33480000

約数和(自身を除く): 12423022

約数列:

[1, 2, 19, 38, 149, 298, 2831, 3719, 5662, 7438, 70661, 141322, 554131, 1108262, 10528489, 21056978]

約数ペア:

[(1, 21056978), (2, 10528489), (19, 1108262), (38, 554131), (149, 141322), (298, 70661), (2831, 7438), (3719, 5662)]