21988967

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{1997}}^1$

素因数の和:2039

約数の個数: 24

約数和(自身を含む): 29762208

約数和(自身を除く): 7773241

約数列:

[1, 7, 11, 13, 77, 91, 121, 143, 847, 1001, 1573, 1997, 11011, 13979, 21967, 25961, 153769, 181727, 241637, 285571, 1691459, 1998997, 3141281, 21988967]

約数ペア:

[(1, 21988967), (7, 3141281), (11, 1998997), (13, 1691459), (77, 285571), (91, 241637), (121, 181727), (143, 153769), (847, 25961), (1001, 21967), (1573, 13979), (1997, 11011)]