661180390

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{391231}}^1$

素因数の和:391264

約数の個数: 24

約数和(自身を含む): 1288718208

約数和(自身を除く): 627537818

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 391231, 782462, 1956155, 3912310, 5086003, 10172006, 25430015, 50860030, 66118039, 132236078, 330590195, 661180390]

約数ペア:

[(1, 661180390), (2, 330590195), (5, 132236078), (10, 66118039), (13, 50860030), (26, 25430015), (65, 10172006), (130, 5086003), (169, 3912310), (338, 1956155), (845, 782462), (1690, 391231)]