21260961

素因数分解:

$3^4\times {\mathrm{199}}^1\times {\mathrm{1319}}^1$

素因数の和:1530

約数の個数: 20

約数和(自身を含む): 31944000

約数和(自身を除く): 10683039

約数列:

[1, 3, 9, 27, 81, 199, 597, 1319, 1791, 3957, 5373, 11871, 16119, 35613, 106839, 262481, 787443, 2362329, 7086987, 21260961]

約数ペア:

[(1, 21260961), (3, 7086987), (9, 2362329), (27, 787443), (81, 262481), (199, 106839), (597, 35613), (1319, 16119), (1791, 11871), (3957, 5373)]