21490767

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{1153}}^1$

素因数の和:1287

約数の個数: 24

約数和(自身を含む): 33004400

約数和(自身を除く): 11513633

約数列:

[1, 3, 9, 19, 57, 109, 171, 327, 981, 1153, 2071, 3459, 6213, 10377, 18639, 21907, 65721, 125677, 197163, 377031, 1131093, 2387863, 7163589, 21490767]

約数ペア:

[(1, 21490767), (3, 7163589), (9, 2387863), (19, 1131093), (57, 377031), (109, 197163), (171, 125677), (327, 65721), (981, 21907), (1153, 18639), (2071, 10377), (3459, 6213)]