19881891

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{199}}^1\times {\mathrm{653}}^1$

素因数の和:875

約数の個数: 24

約数和(自身を含む): 30607200

約数和(自身を除く): 10725309

約数列:

[1, 3, 9, 17, 51, 153, 199, 597, 653, 1791, 1959, 3383, 5877, 10149, 11101, 30447, 33303, 99909, 129947, 389841, 1169523, 2209099, 6627297, 19881891]

約数ペア:

[(1, 19881891), (3, 6627297), (9, 2209099), (17, 1169523), (51, 389841), (153, 129947), (199, 99909), (597, 33303), (653, 30447), (1791, 11101), (1959, 10149), (3383, 5877)]