21070467

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{331}}^1\times {\mathrm{643}}^1$

素因数の和:991

約数の個数: 24

約数和(自身を含む): 33354048

約数和(自身を除く): 12283581

約数列:

[1, 3, 9, 11, 33, 99, 331, 643, 993, 1929, 2979, 3641, 5787, 7073, 10923, 21219, 32769, 63657, 212833, 638499, 1915497, 2341163, 7023489, 21070467]

約数ペア:

[(1, 21070467), (3, 7023489), (9, 2341163), (11, 1915497), (33, 638499), (99, 212833), (331, 63657), (643, 32769), (993, 21219), (1929, 10923), (2979, 7073), (3641, 5787)]