28217889

素因数分解:

$3^5\times 7^1\times {\mathrm{53}}^1\times {\mathrm{313}}^1$

素因数の和:388

約数の個数: 48

約数和(自身を含む): 49375872

約数和(自身を除く): 21157983

約数列:

[1, 3, 7, 9, 21, 27, 53, 63, 81, 159, 189, 243, 313, 371, 477, 567, 939, 1113, 1431, 1701, 2191, 2817, 3339, 4293, 6573, 8451, 10017, 12879, 16589, 19719, 25353, 30051, 49767, 59157, 76059, 90153, 116123, 149301, 177471, 348369, 447903, 532413, 1045107, 1343709, 3135321, 4031127, 9405963, 28217889]

約数ペア:

[(1, 28217889), (3, 9405963), (7, 4031127), (9, 3135321), (21, 1343709), (27, 1045107), (53, 532413), (63, 447903), (81, 348369), (159, 177471), (189, 149301), (243, 116123), (313, 90153), (371, 76059), (477, 59157), (567, 49767), (939, 30051), (1113, 25353), (1431, 19719), (1701, 16589), (2191, 12879), (2817, 10017), (3339, 8451), (4293, 6573)]