21107727

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:232

約数の個数: 48

約数和(自身を含む): 34875360

約数和(自身を除く): 13767633

約数列:

[1, 3, 9, 17, 19, 51, 53, 57, 137, 153, 159, 171, 323, 411, 477, 901, 969, 1007, 1233, 2329, 2603, 2703, 2907, 3021, 6987, 7261, 7809, 8109, 9063, 17119, 20961, 21783, 23427, 44251, 51357, 65349, 123437, 132753, 137959, 154071, 370311, 398259, 413877, 1110933, 1241631, 2345303, 7035909, 21107727]

約数ペア:

[(1, 21107727), (3, 7035909), (9, 2345303), (17, 1241631), (19, 1110933), (51, 413877), (53, 398259), (57, 370311), (137, 154071), (153, 137959), (159, 132753), (171, 123437), (323, 65349), (411, 51357), (477, 44251), (901, 23427), (969, 21783), (1007, 20961), (1233, 17119), (2329, 9063), (2603, 8109), (2703, 7809), (2907, 7261), (3021, 6987)]