20642517

素因数分解:

$3^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{2087}}^1$

素因数の和:2257

約数の個数: 24

約数和(自身を含む): 34310016

約数和(自身を除く): 13667499

約数列:

[1, 3, 7, 9, 21, 63, 157, 471, 1099, 1413, 2087, 3297, 6261, 9891, 14609, 18783, 43827, 131481, 327659, 982977, 2293613, 2948931, 6880839, 20642517]

約数ペア:

[(1, 20642517), (3, 6880839), (7, 2948931), (9, 2293613), (21, 982977), (63, 327659), (157, 131481), (471, 43827), (1099, 18783), (1413, 14609), (2087, 9891), (3297, 6261)]