20646729

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{79}}^1\times {\mathrm{409}}^1$

素因数の和:565

約数の個数: 24

約数和(自身を含む): 30700800

約数和(自身を除く): 10054071

約数列:

[1, 3, 9, 71, 79, 213, 237, 409, 639, 711, 1227, 3681, 5609, 16827, 29039, 32311, 50481, 87117, 96933, 261351, 290799, 2294081, 6882243, 20646729]

約数ペア:

[(1, 20646729), (3, 6882243), (9, 2294081), (71, 290799), (79, 261351), (213, 96933), (237, 87117), (409, 50481), (639, 32311), (711, 29039), (1227, 16827), (3681, 5609)]