21509807

素因数分解:

${\mathrm{11}}^2\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{131}}^1$

素因数の和:235

約数の個数: 24

約数和(自身を含む): 25280640

約数和(自身を除く): 3770833

約数列:

[1, 11, 23, 59, 121, 131, 253, 649, 1357, 1441, 2783, 3013, 7139, 7729, 14927, 15851, 33143, 85019, 164197, 177767, 364573, 935209, 1955437, 21509807]

約数ペア:

[(1, 21509807), (11, 1955437), (23, 935209), (59, 364573), (121, 177767), (131, 164197), (253, 85019), (649, 33143), (1357, 15851), (1441, 14927), (2783, 7729), (3013, 7139)]