20178562887

素因数分解:

$3^3\times 7^1\times {\mathrm{521}}^1\times {\mathrm{204923}}^1$

素因数の和:205460

約数の個数: 32

約数和(自身を含む): 34230504960

約数和(自身を除く): 14051942073

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 521, 1563, 3647, 4689, 10941, 14067, 32823, 98469, 204923, 614769, 1434461, 1844307, 4303383, 5532921, 12910149, 38730447, 106764883, 320294649, 747354181, 960883947, 2242062543, 2882651841, 6726187629, 20178562887]

約数ペア:

[(1, 20178562887), (3, 6726187629), (7, 2882651841), (9, 2242062543), (21, 960883947), (27, 747354181), (63, 320294649), (189, 106764883), (521, 38730447), (1563, 12910149), (3647, 5532921), (4689, 4303383), (10941, 1844307), (14067, 1434461), (32823, 614769), (98469, 204923)]