28259721

素因数分解:

$3^2\times 7^2\times {\mathrm{64081}}^1$

素因数の和:64101

約数の個数: 18

約数和(自身を含む): 47484762

約数和(自身を除く): 19225041

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 64081, 192243, 448567, 576729, 1345701, 3139969, 4037103, 9419907, 28259721]

約数ペア:

[(1, 28259721), (3, 9419907), (7, 4037103), (9, 3139969), (21, 1345701), (49, 576729), (63, 448567), (147, 192243), (441, 64081)]