21004947

素因数分解:

$3^3\times {\mathrm{73}}^1\times {\mathrm{10657}}^1$

素因数の和:10739

約数の個数: 16

約数和(自身を含む): 31547680

約数和(自身を除く): 10542733

約数列:

[1, 3, 9, 27, 73, 219, 657, 1971, 10657, 31971, 95913, 287739, 777961, 2333883, 7001649, 21004947]

約数ペア:

[(1, 21004947), (3, 7001649), (9, 2333883), (27, 777961), (73, 287739), (219, 95913), (657, 31971), (1971, 10657)]