20815137

素因数分解:

$3^6\times 7^1\times {\mathrm{4079}}^1$

素因数の和:4104

約数の個数: 28

約数和(自身を含む): 35675520

約数和(自身を除く): 14860383

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 729, 1701, 4079, 5103, 12237, 28553, 36711, 85659, 110133, 256977, 330399, 770931, 991197, 2312793, 2973591, 6938379, 20815137]

約数ペア:

[(1, 20815137), (3, 6938379), (7, 2973591), (9, 2312793), (21, 991197), (27, 770931), (63, 330399), (81, 256977), (189, 110133), (243, 85659), (567, 36711), (729, 28553), (1701, 12237), (4079, 5103)]