17811981

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{19991}}^1$

素因数の和:20014

約数の個数: 20

約数和(自身を含む): 29028384

約数和(自身を除く): 11216403

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 297, 891, 19991, 59973, 179919, 219901, 539757, 659703, 1619271, 1979109, 5937327, 17811981]

約数ペア:

[(1, 17811981), (3, 5937327), (9, 1979109), (11, 1619271), (27, 659703), (33, 539757), (81, 219901), (99, 179919), (297, 59973), (891, 19991)]