21056589

素因数分解:

$3^2\times {\mathrm{37}}^2\times {\mathrm{1709}}^1$

素因数の和:1789

約数の個数: 18

約数和(自身を含む): 31277610

約数和(自身を除く): 10221021

約数列:

[1, 3, 9, 37, 111, 333, 1369, 1709, 4107, 5127, 12321, 15381, 63233, 189699, 569097, 2339621, 7018863, 21056589]

約数ペア:

[(1, 21056589), (3, 7018863), (9, 2339621), (37, 569097), (111, 189699), (333, 63233), (1369, 15381), (1709, 12321), (4107, 5127)]