20791280

素因数分解:

$2^4\times 5^1\times {\mathrm{293}}^1\times {\mathrm{887}}^1$

素因数の和:1193

約数の個数: 40

約数和(自身を含む): 48559392

約数和(自身を除く): 27768112

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 293, 586, 887, 1172, 1465, 1774, 2344, 2930, 3548, 4435, 4688, 5860, 7096, 8870, 11720, 14192, 17740, 23440, 35480, 70960, 259891, 519782, 1039564, 1299455, 2079128, 2598910, 4158256, 5197820, 10395640, 20791280]

約数ペア:

[(1, 20791280), (2, 10395640), (4, 5197820), (5, 4158256), (8, 2598910), (10, 2079128), (16, 1299455), (20, 1039564), (40, 519782), (80, 259891), (293, 70960), (586, 35480), (887, 23440), (1172, 17740), (1465, 14192), (1774, 11720), (2344, 8870), (2930, 7096), (3548, 5860), (4435, 4688)]