21921321

素因数分解:

$3^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{1061}}^1$

素因数の和:1232

約数の個数: 16

約数和(自身を含む): 29973888

約数和(自身を除く): 8052567

約数列:

[1, 3, 71, 97, 213, 291, 1061, 3183, 6887, 20661, 75331, 102917, 225993, 308751, 7307107, 21921321]

約数ペア:

[(1, 21921321), (3, 7307107), (71, 308751), (97, 225993), (213, 102917), (291, 75331), (1061, 20661), (3183, 6887)]