21327201

素因数分解:

$3^2\times 7^2\times {\mathrm{137}}^1\times {\mathrm{353}}^1$

素因数の和:510

約数の個数: 36

約数和(自身を含む): 36199332

約数和(自身を除く): 14872131

約数列:

[1, 3, 7, 9, 21, 49, 63, 137, 147, 353, 411, 441, 959, 1059, 1233, 2471, 2877, 3177, 6713, 7413, 8631, 17297, 20139, 22239, 48361, 51891, 60417, 145083, 155673, 338527, 435249, 1015581, 2369689, 3046743, 7109067, 21327201]

約数ペア:

[(1, 21327201), (3, 7109067), (7, 3046743), (9, 2369689), (21, 1015581), (49, 435249), (63, 338527), (137, 155673), (147, 145083), (353, 60417), (411, 51891), (441, 48361), (959, 22239), (1059, 20139), (1233, 17297), (2471, 8631), (2877, 7413), (3177, 6713)]