18720681

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{46919}}^1$

素因数の和:46948

約数の個数: 16

約数和(自身を含む): 30028800

約数和(自身を除く): 11308119

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 46919, 140757, 328433, 891461, 985299, 2674383, 6240227, 18720681]

約数ペア:

[(1, 18720681), (3, 6240227), (7, 2674383), (19, 985299), (21, 891461), (57, 328433), (133, 140757), (399, 46919)]