20910393

素因数分解:

$3^5\times 7^1\times {\mathrm{19}}^1\times {\mathrm{647}}^1$

素因数の和:688

約数の個数: 48

約数和(自身を含む): 37739520

約数和(自身を除く): 16829127

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 81, 133, 171, 189, 243, 399, 513, 567, 647, 1197, 1539, 1701, 1941, 3591, 4529, 4617, 5823, 10773, 12293, 13587, 17469, 32319, 36879, 40761, 52407, 86051, 110637, 122283, 157221, 258153, 331911, 366849, 774459, 995733, 1100547, 2323377, 2987199, 6970131, 20910393]

約数ペア:

[(1, 20910393), (3, 6970131), (7, 2987199), (9, 2323377), (19, 1100547), (21, 995733), (27, 774459), (57, 366849), (63, 331911), (81, 258153), (133, 157221), (171, 122283), (189, 110637), (243, 86051), (399, 52407), (513, 40761), (567, 36879), (647, 32319), (1197, 17469), (1539, 13587), (1701, 12293), (1941, 10773), (3591, 5823), (4529, 4617)]