20686765

素因数分解:

$5^1\times {\mathrm{11}}^2\times {\mathrm{31}}^1\times {\mathrm{1103}}^1$

素因数の和:1161

約数の個数: 24

約数和(自身を含む): 28191744

約数和(自身を除く): 7504979

約数列:

[1, 5, 11, 31, 55, 121, 155, 341, 605, 1103, 1705, 3751, 5515, 12133, 18755, 34193, 60665, 133463, 170965, 376123, 667315, 1880615, 4137353, 20686765]

約数ペア:

[(1, 20686765), (5, 4137353), (11, 1880615), (31, 667315), (55, 376123), (121, 170965), (155, 133463), (341, 60665), (605, 34193), (1103, 18755), (1705, 12133), (3751, 5515)]