21205880189

素因数分解:

${\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{37}}^1\times {\mathrm{199489}}^1$

素因数の和:199569

約数の個数: 24

約数和(自身を含む): 24970562280

約数和(自身を除く): 3764682091

約数列:

[1, 13, 17, 37, 169, 221, 481, 629, 2873, 6253, 8177, 106301, 199489, 2593357, 3391313, 7381093, 33713641, 44087069, 95954209, 125478581, 573131897, 1247404717, 1631221553, 21205880189]

約数ペア:

[(1, 21205880189), (13, 1631221553), (17, 1247404717), (37, 573131897), (169, 125478581), (221, 95954209), (481, 44087069), (629, 33713641), (2873, 7381093), (6253, 3391313), (8177, 2593357), (106301, 199489)]