28531209

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{137}}^1\times {\mathrm{211}}^1$

素因数の和:405

約数の個数: 32

約数和(自身を含む): 44937216

約数和(自身を除く): 16406007

約数列:

[1, 3, 7, 21, 47, 137, 141, 211, 329, 411, 633, 959, 987, 1477, 2877, 4431, 6439, 9917, 19317, 28907, 29751, 45073, 69419, 86721, 135219, 202349, 208257, 607047, 1358629, 4075887, 9510403, 28531209]

約数ペア:

[(1, 28531209), (3, 9510403), (7, 4075887), (21, 1358629), (47, 607047), (137, 208257), (141, 202349), (211, 135219), (329, 86721), (411, 69419), (633, 45073), (959, 29751), (987, 28907), (1477, 19317), (2877, 9917), (4431, 6439)]