16987563

素因数分解:

$3^4\times {\mathrm{401}}^1\times {\mathrm{523}}^1$

素因数の和:936

約数の個数: 20

約数和(自身を含む): 25488408

約数和(自身を除く): 8500845

約数列:

[1, 3, 9, 27, 81, 401, 523, 1203, 1569, 3609, 4707, 10827, 14121, 32481, 42363, 209723, 629169, 1887507, 5662521, 16987563]

約数ペア:

[(1, 16987563), (3, 5662521), (9, 1887507), (27, 629169), (81, 209723), (401, 42363), (523, 32481), (1203, 14121), (1569, 10827), (3609, 4707)]