21192009

素因数分解:

$3^1\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{2689}}^1$

素因数の和:2800

約数の個数: 16

約数和(自身を含む): 29439360

約数和(自身を除く): 8247351

約数列:

[1, 3, 37, 71, 111, 213, 2627, 2689, 7881, 8067, 99493, 190919, 298479, 572757, 7064003, 21192009]

約数ペア:

[(1, 21192009), (3, 7064003), (37, 572757), (71, 298479), (111, 190919), (213, 99493), (2627, 8067), (2689, 7881)]