20745185

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{4001}}^1$

素因数の和:4084

約数の個数: 16

約数和(自身を含む): 26797392

約数和(自身を除く): 6052207

約数列:

[1, 5, 17, 61, 85, 305, 1037, 4001, 5185, 20005, 68017, 244061, 340085, 1220305, 4149037, 20745185]

約数ペア:

[(1, 20745185), (5, 4149037), (17, 1220305), (61, 340085), (85, 244061), (305, 68017), (1037, 20005), (4001, 5185)]