21640815

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{103}}^1$

素因数の和:173

約数の個数: 96

約数和(自身を含む): 46725120

約数和(自身を除く): 25084305

約数列:

[1, 3, 5, 7, 9, 15, 21, 23, 29, 35, 45, 63, 69, 87, 103, 105, 115, 145, 161, 203, 207, 261, 309, 315, 345, 435, 483, 515, 609, 667, 721, 805, 927, 1015, 1035, 1305, 1449, 1545, 1827, 2001, 2163, 2369, 2415, 2987, 3045, 3335, 3605, 4635, 4669, 6003, 6489, 7107, 7245, 8961, 9135, 10005, 10815, 11845, 14007, 14935, 16583, 20909, 21321, 23345, 26883, 30015, 32445, 35535, 42021, 44805, 49749, 62727, 68701, 70035, 82915, 104545, 106605, 134415, 149247, 188181, 206103, 210105, 248745, 313635, 343505, 480907, 618309, 746235, 940905, 1030515, 1442721, 2404535, 3091545, 4328163, 7213605, 21640815]

約数ペア:

[(1, 21640815), (3, 7213605), (5, 4328163), (7, 3091545), (9, 2404535), (15, 1442721), (21, 1030515), (23, 940905), (29, 746235), (35, 618309), (45, 480907), (63, 343505), (69, 313635), (87, 248745), (103, 210105), (105, 206103), (115, 188181), (145, 149247), (161, 134415), (203, 106605), (207, 104545), (261, 82915), (309, 70035), (315, 68701), (345, 62727), (435, 49749), (483, 44805), (515, 42021), (609, 35535), (667, 32445), (721, 30015), (805, 26883), (927, 23345), (1015, 21321), (1035, 20909), (1305, 16583), (1449, 14935), (1545, 14007), (1827, 11845), (2001, 10815), (2163, 10005), (2369, 9135), (2415, 8961), (2987, 7245), (3045, 7107), (3335, 6489), (3605, 6003), (4635, 4669)]