21229989

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{83}}^1\times {\mathrm{337}}^1$

素因数の和:457

約数の個数: 32

約数和(自身を含む): 32707584

約数和(自身を除く): 11477595

約数列:

[1, 3, 11, 23, 33, 69, 83, 249, 253, 337, 759, 913, 1011, 1909, 2739, 3707, 5727, 7751, 11121, 20999, 23253, 27971, 62997, 83913, 85261, 255783, 307681, 643333, 923043, 1929999, 7076663, 21229989]

約数ペア:

[(1, 21229989), (3, 7076663), (11, 1929999), (23, 923043), (33, 643333), (69, 307681), (83, 255783), (249, 85261), (253, 83913), (337, 62997), (759, 27971), (913, 23253), (1011, 20999), (1909, 11121), (2739, 7751), (3707, 5727)]