21209397

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{163}}^1\times {\mathrm{3943}}^1$

素因数の和:4120

約数の個数: 16

約数和(自身を含む): 31047168

約数和(自身を除く): 9837771

約数列:

[1, 3, 11, 33, 163, 489, 1793, 3943, 5379, 11829, 43373, 130119, 642709, 1928127, 7069799, 21209397]

約数ペア:

[(1, 21209397), (3, 7069799), (11, 1928127), (33, 642709), (163, 130119), (489, 43373), (1793, 11829), (3943, 5379)]