21021579

素因数分解:

$3^3\times {\mathrm{103}}^1\times {\mathrm{7559}}^1$

素因数の和:7671

約数の個数: 16

約数和(自身を含む): 31449600

約数和(自身を除く): 10428021

約数列:

[1, 3, 9, 27, 103, 309, 927, 2781, 7559, 22677, 68031, 204093, 778577, 2335731, 7007193, 21021579]

約数ペア:

[(1, 21021579), (3, 7007193), (9, 2335731), (27, 778577), (103, 204093), (309, 68031), (927, 22677), (2781, 7559)]