20812887

素因数分解:

$3^2\times {\mathrm{127}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:403

約数の個数: 24

約数和(自身を含む): 30750720

約数和(自身を除く): 9937833

約数列:

[1, 3, 9, 127, 131, 139, 381, 393, 417, 1143, 1179, 1251, 16637, 17653, 18209, 49911, 52959, 54627, 149733, 158877, 163881, 2312543, 6937629, 20812887]

約数ペア:

[(1, 20812887), (3, 6937629), (9, 2312543), (127, 163881), (131, 158877), (139, 149733), (381, 54627), (393, 52959), (417, 49911), (1143, 18209), (1179, 17653), (1251, 16637)]