21008721

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{127}}^1\times {\mathrm{823}}^1$

素因数の和:1020

約数の個数: 16

約数和(自身を含む): 28688384

約数和(自身を除く): 7679663

約数列:

[1, 3, 67, 127, 201, 381, 823, 2469, 8509, 25527, 55141, 104521, 165423, 313563, 7002907, 21008721]

約数ペア:

[(1, 21008721), (3, 7002907), (67, 313563), (127, 165423), (201, 104521), (381, 55141), (823, 25527), (2469, 8509)]