20887821

素因数分解:

$3^3\times {\mathrm{19}}^2\times {\mathrm{2143}}^1$

素因数の和:2190

約数の個数: 24

約数和(自身を含む): 32674560

約数和(自身を除く): 11786739

約数列:

[1, 3, 9, 19, 27, 57, 171, 361, 513, 1083, 2143, 3249, 6429, 9747, 19287, 40717, 57861, 122151, 366453, 773623, 1099359, 2320869, 6962607, 20887821]

約数ペア:

[(1, 20887821), (3, 6962607), (9, 2320869), (19, 1099359), (27, 773623), (57, 366453), (171, 122151), (361, 57861), (513, 40717), (1083, 19287), (2143, 9747), (3249, 6429)]