21275415

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{137}}^1$

素因数の和:201

約数の個数: 96

約数和(自身を含む): 46500480

約数和(自身を除く): 25225065

約数列:

[1, 3, 5, 7, 9, 15, 17, 21, 29, 35, 45, 51, 63, 85, 87, 105, 119, 137, 145, 153, 203, 255, 261, 315, 357, 411, 435, 493, 595, 609, 685, 765, 959, 1015, 1071, 1233, 1305, 1479, 1785, 1827, 2055, 2329, 2465, 2877, 3045, 3451, 3973, 4437, 4795, 5355, 6165, 6987, 7395, 8631, 9135, 10353, 11645, 11919, 14385, 16303, 17255, 19865, 20961, 22185, 27811, 31059, 34935, 35757, 43155, 48909, 51765, 59595, 67541, 81515, 83433, 104805, 139055, 146727, 155295, 178785, 202623, 244545, 250299, 337705, 417165, 472787, 607869, 733635, 1013115, 1251495, 1418361, 2363935, 3039345, 4255083, 7091805, 21275415]

約数ペア:

[(1, 21275415), (3, 7091805), (5, 4255083), (7, 3039345), (9, 2363935), (15, 1418361), (17, 1251495), (21, 1013115), (29, 733635), (35, 607869), (45, 472787), (51, 417165), (63, 337705), (85, 250299), (87, 244545), (105, 202623), (119, 178785), (137, 155295), (145, 146727), (153, 139055), (203, 104805), (255, 83433), (261, 81515), (315, 67541), (357, 59595), (411, 51765), (435, 48909), (493, 43155), (595, 35757), (609, 34935), (685, 31059), (765, 27811), (959, 22185), (1015, 20961), (1071, 19865), (1233, 17255), (1305, 16303), (1479, 14385), (1785, 11919), (1827, 11645), (2055, 10353), (2329, 9135), (2465, 8631), (2877, 7395), (3045, 6987), (3451, 6165), (3973, 5355), (4437, 4795)]