21648255

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{20327}}^1$

素因数の和:20406

約数の個数: 16

約数和(自身を含む): 35126784

約数和(自身を除く): 13478529

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 20327, 60981, 101635, 304905, 1443217, 4329651, 7216085, 21648255]

約数ペア:

[(1, 21648255), (3, 7216085), (5, 4329651), (15, 1443217), (71, 304905), (213, 101635), (355, 60981), (1065, 20327)]