21004839

素因数分解:

$3^4\times {\mathrm{211}}^1\times {\mathrm{1229}}^1$

素因数の和:1452

約数の個数: 20

約数和(自身を含む): 31551960

約数和(自身を除く): 10547121

約数列:

[1, 3, 9, 27, 81, 211, 633, 1229, 1899, 3687, 5697, 11061, 17091, 33183, 99549, 259319, 777957, 2333871, 7001613, 21004839]

約数ペア:

[(1, 21004839), (3, 7001613), (9, 2333871), (27, 777957), (81, 259319), (211, 99549), (633, 33183), (1229, 17091), (1899, 11061), (3687, 5697)]