21351291

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{1831}}^1$

素因数の和:1883

約数の個数: 24

約数和(自身を含む): 32184576

約数和(自身を除く): 10833285

約数列:

[1, 3, 13, 23, 39, 69, 169, 299, 507, 897, 1831, 3887, 5493, 11661, 23803, 42113, 71409, 126339, 309439, 547469, 928317, 1642407, 7117097, 21351291]

約数ペア:

[(1, 21351291), (3, 7117097), (13, 1642407), (23, 928317), (39, 547469), (69, 309439), (169, 126339), (299, 71409), (507, 42113), (897, 23803), (1831, 11661), (3887, 5493)]