21990306

素因数分解:

$2^1\times 3^1\times {\mathrm{13}}^1\times {\mathrm{281927}}^1$

素因数の和:281945

約数の個数: 16

約数和(自身を含む): 47363904

約数和(自身を除く): 25373598

約数列:

[1, 2, 3, 6, 13, 26, 39, 78, 281927, 563854, 845781, 1691562, 3665051, 7330102, 10995153, 21990306]

約数ペア:

[(1, 21990306), (2, 10995153), (3, 7330102), (6, 3665051), (13, 1691562), (26, 845781), (39, 563854), (78, 281927)]