21120129

素因数分解:

$3^3\times {\mathrm{53}}^1\times {\mathrm{14759}}^1$

素因数の和:14821

約数の個数: 16

約数和(自身を含む): 31881600

約数和(自身を除く): 10761471

約数列:

[1, 3, 9, 27, 53, 159, 477, 1431, 14759, 44277, 132831, 398493, 782227, 2346681, 7040043, 21120129]

約数ペア:

[(1, 21120129), (3, 7040043), (9, 2346681), (27, 782227), (53, 398493), (159, 132831), (477, 44277), (1431, 14759)]