20256957

素因数分解:

$3^2\times 7^1\times {\mathrm{137}}^1\times {\mathrm{2347}}^1$

素因数の和:2497

約数の個数: 24

約数和(自身を含む): 33698496

約数和(自身を除く): 13441539

約数列:

[1, 3, 7, 9, 21, 63, 137, 411, 959, 1233, 2347, 2877, 7041, 8631, 16429, 21123, 49287, 147861, 321539, 964617, 2250773, 2893851, 6752319, 20256957]

約数ペア:

[(1, 20256957), (3, 6752319), (7, 2893851), (9, 2250773), (21, 964617), (63, 321539), (137, 147861), (411, 49287), (959, 21123), (1233, 16429), (2347, 8631), (2877, 7041)]