20784519

素因数分解:

$3^6\times 7^1\times {\mathrm{4073}}^1$

素因数の和:4098

約数の個数: 28

約数和(自身を含む): 35623056

約数和(自身を除く): 14838537

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 729, 1701, 4073, 5103, 12219, 28511, 36657, 85533, 109971, 256599, 329913, 769797, 989739, 2309391, 2969217, 6928173, 20784519]

約数ペア:

[(1, 20784519), (3, 6928173), (7, 2969217), (9, 2309391), (21, 989739), (27, 769797), (63, 329913), (81, 256599), (189, 109971), (243, 85533), (567, 36657), (729, 28511), (1701, 12219), (4073, 5103)]