28720431

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{1579}}^1$

素因数の和:1675

約数の個数: 24

約数和(自身を含む): 43380480

約数和(自身を除く): 14660049

約数列:

[1, 3, 9, 43, 47, 129, 141, 387, 423, 1579, 2021, 4737, 6063, 14211, 18189, 67897, 74213, 203691, 222639, 611073, 667917, 3191159, 9573477, 28720431]

約数ペア:

[(1, 28720431), (3, 9573477), (9, 3191159), (43, 667917), (47, 611073), (129, 222639), (141, 203691), (387, 74213), (423, 67897), (1579, 18189), (2021, 14211), (4737, 6063)]