19997747

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{13669}}^1$

素因数の和:13706

約数の個数: 16

約数和(自身を含む): 26246400

約数和(自身を除く): 6248653

約数列:

[1, 7, 11, 19, 77, 133, 209, 1463, 13669, 95683, 150359, 259711, 1052513, 1817977, 2856821, 19997747]

約数ペア:

[(1, 19997747), (7, 2856821), (11, 1817977), (19, 1052513), (77, 259711), (133, 150359), (209, 95683), (1463, 13669)]