21655491

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{13}}^2\times {\mathrm{353}}^1$

素因数の和:404

約数の個数: 36

約数和(自身を含む): 34464024

約数和(自身を除く): 12808533

約数列:

[1, 3, 11, 13, 33, 39, 121, 143, 169, 353, 363, 429, 507, 1059, 1573, 1859, 3883, 4589, 4719, 5577, 11649, 13767, 20449, 42713, 50479, 59657, 61347, 128139, 151437, 178971, 555269, 656227, 1665807, 1968681, 7218497, 21655491]

約数ペア:

[(1, 21655491), (3, 7218497), (11, 1968681), (13, 1665807), (33, 656227), (39, 555269), (121, 178971), (143, 151437), (169, 128139), (353, 61347), (363, 59657), (429, 50479), (507, 42713), (1059, 20449), (1573, 13767), (1859, 11649), (3883, 5577), (4589, 4719)]