21205732

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{2861}}^1$

素因数の和:2991

約数の個数: 24

約数和(自身を含む): 39667320

約数和(自身を除く): 18461588

約数列:

[1, 2, 4, 17, 34, 68, 109, 218, 436, 1853, 2861, 3706, 5722, 7412, 11444, 48637, 97274, 194548, 311849, 623698, 1247396, 5301433, 10602866, 21205732]

約数ペア:

[(1, 21205732), (2, 10602866), (4, 5301433), (17, 1247396), (34, 623698), (68, 311849), (109, 194548), (218, 97274), (436, 48637), (1853, 11444), (2861, 7412), (3706, 5722)]