21540411

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{15643}}^1$

素因数の和:15672

約数の個数: 20

約数和(自身を含む): 34072632

約数和(自身を除く): 12532221

約数列:

[1, 3, 9, 17, 27, 51, 81, 153, 459, 1377, 15643, 46929, 140787, 265931, 422361, 797793, 1267083, 2393379, 7180137, 21540411]

約数ペア:

[(1, 21540411), (3, 7180137), (9, 2393379), (17, 1267083), (27, 797793), (51, 422361), (81, 265931), (153, 140787), (459, 46929), (1377, 15643)]