20390695

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{59}}^1\times {\mathrm{409}}^1$

素因数の和:499

約数の個数: 24

約数和(自身を含む): 27010800

約数和(自身を除く): 6620105

約数列:

[1, 5, 13, 59, 65, 169, 295, 409, 767, 845, 2045, 3835, 5317, 9971, 24131, 26585, 49855, 69121, 120655, 313703, 345605, 1568515, 4078139, 20390695]

約数ペア:

[(1, 20390695), (5, 4078139), (13, 1568515), (59, 345605), (65, 313703), (169, 120655), (295, 69121), (409, 49855), (767, 26585), (845, 24131), (2045, 9971), (3835, 5317)]