21780231

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{15349}}^1$

素因数の和:15406

約数の個数: 16

約数和(自身を含む): 32419200

約数和(自身を除く): 10638969

約数列:

[1, 3, 11, 33, 43, 129, 473, 1419, 15349, 46047, 168839, 506517, 660007, 1980021, 7260077, 21780231]

約数ペア:

[(1, 21780231), (3, 7260077), (11, 1980021), (33, 660007), (43, 506517), (129, 168839), (473, 46047), (1419, 15349)]