991071207

素因数分解:

$3^4\times 7^2\times {\mathrm{249703}}^1$

素因数の和:249729

約数の個数: 30

約数和(自身を含む): 1722208488

約数和(自身を除く): 731137281

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 441, 567, 1323, 3969, 249703, 749109, 1747921, 2247327, 5243763, 6741981, 12235447, 15731289, 20225943, 36706341, 47193867, 110119023, 141581601, 330357069, 991071207]

約数ペア:

[(1, 991071207), (3, 330357069), (7, 141581601), (9, 110119023), (21, 47193867), (27, 36706341), (49, 20225943), (63, 15731289), (81, 12235447), (147, 6741981), (189, 5243763), (441, 2247327), (567, 1747921), (1323, 749109), (3969, 249703)]