21757311

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{431}}^1$

素因数の和:587

約数の個数: 24

約数和(自身を含む): 32348160

約数和(自身を除く): 10590849

約数列:

[1, 3, 9, 71, 79, 213, 237, 431, 639, 711, 1293, 3879, 5609, 16827, 30601, 34049, 50481, 91803, 102147, 275409, 306441, 2417479, 7252437, 21757311]

約数ペア:

[(1, 21757311), (3, 7252437), (9, 2417479), (71, 306441), (79, 275409), (213, 102147), (237, 91803), (431, 50481), (639, 34049), (711, 30601), (1293, 16827), (3879, 5609)]