21691287

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{21713}}^1$

素因数の和:21759

約数の個数: 16

約数和(自身を含む): 33005280

約数和(自身を除く): 11313993

約数列:

[1, 3, 9, 27, 37, 111, 333, 999, 21713, 65139, 195417, 586251, 803381, 2410143, 7230429, 21691287]

約数ペア:

[(1, 21691287), (3, 7230429), (9, 2410143), (27, 803381), (37, 586251), (111, 195417), (333, 65139), (999, 21713)]