261640449

素因数分解:

$3^4\times 7^2\times {\mathrm{65921}}^1$

素因数の和:65947

約数の個数: 30

約数和(自身を含む): 454664034

約数和(自身を除く): 193023585

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 441, 567, 1323, 3969, 65921, 197763, 461447, 593289, 1384341, 1779867, 3230129, 4153023, 5339601, 9690387, 12459069, 29071161, 37377207, 87213483, 261640449]

約数ペア:

[(1, 261640449), (3, 87213483), (7, 37377207), (9, 29071161), (21, 12459069), (27, 9690387), (49, 5339601), (63, 4153023), (81, 3230129), (147, 1779867), (189, 1384341), (441, 593289), (567, 461447), (1323, 197763), (3969, 65921)]