21038481

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{18121}}^1$

素因数の和:18173

約数の個数: 16

約数和(自身を含む): 31894720

約数和(自身を除く): 10856239

約数列:

[1, 3, 9, 27, 43, 129, 387, 1161, 18121, 54363, 163089, 489267, 779203, 2337609, 7012827, 21038481]

約数ペア:

[(1, 21038481), (3, 7012827), (9, 2337609), (27, 779203), (43, 489267), (129, 163089), (387, 54363), (1161, 18121)]