19721691

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{66403}}^1$

素因数の和:66423

約数の個数: 16

約数和(自身を含む): 31873920

約数和(自身を除く): 12152229

約数列:

[1, 3, 9, 11, 27, 33, 99, 297, 66403, 199209, 597627, 730433, 1792881, 2191299, 6573897, 19721691]

約数ペア:

[(1, 19721691), (3, 6573897), (9, 2191299), (11, 1792881), (27, 730433), (33, 597627), (99, 199209), (297, 66403)]