31787721

素因数分解:

$3^4\times 7^2\times {\mathrm{8009}}^1$

素因数の和:8035

約数の個数: 30

約数和(自身を含む): 55244970

約数和(自身を除く): 23457249

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 441, 567, 1323, 3969, 8009, 24027, 56063, 72081, 168189, 216243, 392441, 504567, 648729, 1177323, 1513701, 3531969, 4541103, 10595907, 31787721]

約数ペア:

[(1, 31787721), (3, 10595907), (7, 4541103), (9, 3531969), (21, 1513701), (27, 1177323), (49, 648729), (63, 504567), (81, 392441), (147, 216243), (189, 168189), (441, 72081), (567, 56063), (1323, 24027), (3969, 8009)]