21041319

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{12547}}^1$

素因数の和:12606

約数の個数: 16

約数和(自身を含む): 30918272

約数和(自身を除く): 9876953

約数列:

[1, 3, 13, 39, 43, 129, 559, 1677, 12547, 37641, 163111, 489333, 539521, 1618563, 7013773, 21041319]

約数ペア:

[(1, 21041319), (3, 7013773), (13, 1618563), (39, 539521), (43, 489333), (129, 163111), (559, 37641), (1677, 12547)]