18840321

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{89}}^1\times {\mathrm{547}}^1$

素因数の和:685

約数の個数: 24

約数和(自身を含む): 28211040

約数和(自身を除く): 9370719

約数列:

[1, 3, 9, 43, 89, 129, 267, 387, 547, 801, 1641, 3827, 4923, 11481, 23521, 34443, 48683, 70563, 146049, 211689, 438147, 2093369, 6280107, 18840321]

約数ペア:

[(1, 18840321), (3, 6280107), (9, 2093369), (43, 438147), (89, 211689), (129, 146049), (267, 70563), (387, 48683), (547, 34443), (801, 23521), (1641, 11481), (3827, 4923)]