21686907

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{28573}}^1$

素因数の和:28610

約数の個数: 16

約数和(自身を含む): 32917248

約数和(自身を除く): 11230341

約数列:

[1, 3, 11, 23, 33, 69, 253, 759, 28573, 85719, 314303, 657179, 942909, 1971537, 7228969, 21686907]

約数ペア:

[(1, 21686907), (3, 7228969), (11, 1971537), (23, 942909), (33, 657179), (69, 314303), (253, 85719), (759, 28573)]