21389355

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{36563}}^1$

素因数の和:36587

約数の個数: 24

約数和(自身を含む): 39927888

約数和(自身を除く): 18538533

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 585, 36563, 109689, 182815, 329067, 475319, 548445, 1425957, 1645335, 2376595, 4277871, 7129785, 21389355]

約数ペア:

[(1, 21389355), (3, 7129785), (5, 4277871), (9, 2376595), (13, 1645335), (15, 1425957), (39, 548445), (45, 475319), (65, 329067), (117, 182815), (195, 109689), (585, 36563)]