21221211

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{6367}}^1$

素因数の和:6482

約数の個数: 16

約数和(自身を含む): 31177728

約数和(自身を除く): 9956517

約数列:

[1, 3, 11, 33, 101, 303, 1111, 3333, 6367, 19101, 70037, 210111, 643067, 1929201, 7073737, 21221211]

約数ペア:

[(1, 21221211), (3, 7073737), (11, 1929201), (33, 643067), (101, 210111), (303, 70037), (1111, 19101), (3333, 6367)]