18921119

素因数分解:

$7^1\times {\mathrm{17}}^2\times {\mathrm{47}}^1\times {\mathrm{199}}^1$

素因数の和:287

約数の個数: 24

約数和(自身を含む): 23577600

約数和(自身を除く): 4656481

約数列:

[1, 7, 17, 47, 119, 199, 289, 329, 799, 1393, 2023, 3383, 5593, 9353, 13583, 23681, 57511, 65471, 95081, 159001, 402577, 1113007, 2703017, 18921119]

約数ペア:

[(1, 18921119), (7, 2703017), (17, 1113007), (47, 402577), (119, 159001), (199, 95081), (289, 65471), (329, 57511), (799, 23681), (1393, 13583), (2023, 9353), (3383, 5593)]