21243978

素因数分解:

$2^1\times 3^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1307}}^1$

素因数の和:1368

約数の個数: 64

約数和(自身を含む): 55249920

約数和(自身を除く): 34005942

約数列:

[1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 43, 54, 63, 86, 126, 129, 189, 258, 301, 378, 387, 602, 774, 903, 1161, 1307, 1806, 2322, 2614, 2709, 3921, 5418, 7842, 8127, 9149, 11763, 16254, 18298, 23526, 27447, 35289, 54894, 56201, 70578, 82341, 112402, 164682, 168603, 247023, 337206, 393407, 494046, 505809, 786814, 1011618, 1180221, 1517427, 2360442, 3034854, 3540663, 7081326, 10621989, 21243978]

約数ペア:

[(1, 21243978), (2, 10621989), (3, 7081326), (6, 3540663), (7, 3034854), (9, 2360442), (14, 1517427), (18, 1180221), (21, 1011618), (27, 786814), (42, 505809), (43, 494046), (54, 393407), (63, 337206), (86, 247023), (126, 168603), (129, 164682), (189, 112402), (258, 82341), (301, 70578), (378, 56201), (387, 54894), (602, 35289), (774, 27447), (903, 23526), (1161, 18298), (1307, 16254), (1806, 11763), (2322, 9149), (2614, 8127), (2709, 7842), (3921, 5418)]