20909805

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{97}}^1\times {\mathrm{2053}}^1$

素因数の和:2165

約数の個数: 32

約数和(自身を含む): 38648064

約数和(自身を除く): 17738259

約数列:

[1, 3, 5, 7, 15, 21, 35, 97, 105, 291, 485, 679, 1455, 2037, 2053, 3395, 6159, 10185, 10265, 14371, 30795, 43113, 71855, 199141, 215565, 597423, 995705, 1393987, 2987115, 4181961, 6969935, 20909805]

約数ペア:

[(1, 20909805), (3, 6969935), (5, 4181961), (7, 2987115), (15, 1393987), (21, 995705), (35, 597423), (97, 215565), (105, 199141), (291, 71855), (485, 43113), (679, 30795), (1455, 14371), (2037, 10265), (2053, 10185), (3395, 6159)]