28784727

素因数分解:

$3^4\times {\mathrm{47}}^1\times {\mathrm{7561}}^1$

素因数の和:7620

約数の個数: 20

約数和(自身を含む): 43920096

約数和(自身を除く): 15135369

約数列:

[1, 3, 9, 27, 47, 81, 141, 423, 1269, 3807, 7561, 22683, 68049, 204147, 355367, 612441, 1066101, 3198303, 9594909, 28784727]

約数ペア:

[(1, 28784727), (3, 9594909), (9, 3198303), (27, 1066101), (47, 612441), (81, 355367), (141, 204147), (423, 68049), (1269, 22683), (3807, 7561)]