12987891

素因数分解:

$3^3\times 7^2\times {\mathrm{9817}}^1$

素因数の和:9840

約数の個数: 24

約数和(自身を含む): 22385040

約数和(自身を除く): 9397149

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 9817, 29451, 68719, 88353, 206157, 265059, 481033, 618471, 1443099, 1855413, 4329297, 12987891]

約数ペア:

[(1, 12987891), (3, 4329297), (7, 1855413), (9, 1443099), (21, 618471), (27, 481033), (49, 265059), (63, 206157), (147, 88353), (189, 68719), (441, 29451), (1323, 9817)]