20406428

素因数分解:

$2^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{31687}}^1$

素因数の和:31721

約数の個数: 24

約数和(自身を含む): 42588672

約数和(自身を除く): 22182244

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 92, 161, 322, 644, 31687, 63374, 126748, 221809, 443618, 728801, 887236, 1457602, 2915204, 5101607, 10203214, 20406428]

約数ペア:

[(1, 20406428), (2, 10203214), (4, 5101607), (7, 2915204), (14, 1457602), (23, 887236), (28, 728801), (46, 443618), (92, 221809), (161, 126748), (322, 63374), (644, 31687)]