19405780

素因数分解:

$2^2\times 5^1\times {\mathrm{449}}^1\times {\mathrm{2161}}^1$

素因数の和:2619

約数の個数: 24

約数和(自身を含む): 40861800

約数和(自身を除く): 21456020

約数列:

[1, 2, 4, 5, 10, 20, 449, 898, 1796, 2161, 2245, 4322, 4490, 8644, 8980, 10805, 21610, 43220, 970289, 1940578, 3881156, 4851445, 9702890, 19405780]

約数ペア:

[(1, 19405780), (2, 9702890), (4, 4851445), (5, 3881156), (10, 1940578), (20, 970289), (449, 43220), (898, 21610), (1796, 10805), (2161, 8980), (2245, 8644), (4322, 4490)]