21121719

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{71}}^1\times {\mathrm{1871}}^1$

素因数の和:1998

約数の個数: 16

約数和(自身を含む): 29113344

約数和(自身を除く): 7991625

約数列:

[1, 3, 53, 71, 159, 213, 1871, 3763, 5613, 11289, 99163, 132841, 297489, 398523, 7040573, 21121719]

約数ペア:

[(1, 21121719), (3, 7040573), (53, 398523), (71, 297489), (159, 132841), (213, 99163), (1871, 11289), (3763, 5613)]