20820903

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{21487}}^1$

素因数の和:21526

約数の個数: 16

約数和(自身を含む): 30942720

約数和(自身を除く): 10121817

約数列:

[1, 3, 17, 19, 51, 57, 323, 969, 21487, 64461, 365279, 408253, 1095837, 1224759, 6940301, 20820903]

約数ペア:

[(1, 20820903), (3, 6940301), (17, 1224759), (19, 1095837), (51, 408253), (57, 365279), (323, 64461), (969, 21487)]