890303911

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1\times {\mathrm{199}}^1\times {\mathrm{389}}^1$

素因数の和:679

約数の個数: 32

約数和(自身を含む): 1078272000

約数和(自身を除く): 187968089

約数列:

[1, 7, 31, 53, 199, 217, 371, 389, 1393, 1643, 2723, 6169, 10547, 11501, 12059, 20617, 43183, 73829, 77411, 84413, 144319, 326957, 541877, 639127, 2288699, 2399741, 4102783, 4473889, 16798187, 28719481, 127186273, 890303911]

約数ペア:

[(1, 890303911), (7, 127186273), (31, 28719481), (53, 16798187), (199, 4473889), (217, 4102783), (371, 2399741), (389, 2288699), (1393, 639127), (1643, 541877), (2723, 326957), (6169, 144319), (10547, 84413), (11501, 77411), (12059, 73829), (20617, 43183)]