257131485

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{439541}}^1$

素因数の和:439565

約数の個数: 24

約数和(自身を含む): 479979864

約数和(自身を除く): 222848379

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 585, 439541, 1318623, 2197705, 3955869, 5714033, 6593115, 17142099, 19779345, 28570165, 51426297, 85710495, 257131485]

約数ペア:

[(1, 257131485), (3, 85710495), (5, 51426297), (9, 28570165), (13, 19779345), (15, 17142099), (39, 6593115), (45, 5714033), (65, 3955869), (117, 2197705), (195, 1318623), (585, 439541)]