21281049

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{11423}}^1$

素因数の和:11458

約数の個数: 20

約数和(自身を含む): 33175296

約数和(自身を除く): 11894247

約数列:

[1, 3, 9, 23, 27, 69, 81, 207, 621, 1863, 11423, 34269, 102807, 262729, 308421, 788187, 925263, 2364561, 7093683, 21281049]

約数ペア:

[(1, 21281049), (3, 7093683), (9, 2364561), (23, 925263), (27, 788187), (69, 308421), (81, 262729), (207, 102807), (621, 34269), (1863, 11423)]