20818413

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^2\times {\mathrm{2731}}^1$

素因数の和:2766

約数の個数: 36

約数和(自身を含む): 37789024

約数和(自身を除く): 16970611

約数列:

[1, 3, 7, 9, 11, 21, 33, 63, 77, 99, 121, 231, 363, 693, 847, 1089, 2541, 2731, 7623, 8193, 19117, 24579, 30041, 57351, 90123, 172053, 210287, 270369, 330451, 630861, 991353, 1892583, 2313157, 2974059, 6939471, 20818413]

約数ペア:

[(1, 20818413), (3, 6939471), (7, 2974059), (9, 2313157), (11, 1892583), (21, 991353), (33, 630861), (63, 330451), (77, 270369), (99, 210287), (121, 172053), (231, 90123), (363, 57351), (693, 30041), (847, 24579), (1089, 19117), (2541, 8193), (2731, 7623)]