21061215

素因数分解:

$3^4\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1$

素因数の和:83

約数の個数: 160

約数和(自身を含む): 50181120

約数和(自身を除く): 29119905

約数列:

[1, 3, 5, 7, 9, 15, 17, 19, 21, 23, 27, 35, 45, 51, 57, 63, 69, 81, 85, 95, 105, 115, 119, 133, 135, 153, 161, 171, 189, 207, 255, 285, 315, 323, 345, 357, 391, 399, 405, 437, 459, 483, 513, 567, 595, 621, 665, 765, 805, 855, 945, 969, 1035, 1071, 1173, 1197, 1311, 1377, 1449, 1539, 1615, 1785, 1863, 1955, 1995, 2185, 2261, 2295, 2415, 2565, 2737, 2835, 2907, 3059, 3105, 3213, 3519, 3591, 3933, 4347, 4845, 5355, 5865, 5985, 6555, 6783, 6885, 7245, 7429, 7695, 8211, 8721, 9177, 9315, 9639, 10557, 10773, 11305, 11799, 13041, 13685, 14535, 15295, 16065, 17595, 17955, 19665, 20349, 21735, 22287, 24633, 26163, 27531, 31671, 33915, 35397, 37145, 41055, 43605, 45885, 48195, 52003, 52785, 53865, 58995, 61047, 65205, 66861, 73899, 82593, 101745, 111435, 123165, 130815, 137655, 156009, 158355, 176985, 183141, 200583, 221697, 247779, 260015, 305235, 334305, 369495, 412965, 468027, 601749, 780045, 915705, 1002915, 1108485, 1238895, 1404081, 2340135, 3008745, 4212243, 7020405, 21061215]

約数ペア:

[(1, 21061215), (3, 7020405), (5, 4212243), (7, 3008745), (9, 2340135), (15, 1404081), (17, 1238895), (19, 1108485), (21, 1002915), (23, 915705), (27, 780045), (35, 601749), (45, 468027), (51, 412965), (57, 369495), (63, 334305), (69, 305235), (81, 260015), (85, 247779), (95, 221697), (105, 200583), (115, 183141), (119, 176985), (133, 158355), (135, 156009), (153, 137655), (161, 130815), (171, 123165), (189, 111435), (207, 101745), (255, 82593), (285, 73899), (315, 66861), (323, 65205), (345, 61047), (357, 58995), (391, 53865), (399, 52785), (405, 52003), (437, 48195), (459, 45885), (483, 43605), (513, 41055), (567, 37145), (595, 35397), (621, 33915), (665, 31671), (765, 27531), (805, 26163), (855, 24633), (945, 22287), (969, 21735), (1035, 20349), (1071, 19665), (1173, 17955), (1197, 17595), (1311, 16065), (1377, 15295), (1449, 14535), (1539, 13685), (1615, 13041), (1785, 11799), (1863, 11305), (1955, 10773), (1995, 10557), (2185, 9639), (2261, 9315), (2295, 9177), (2415, 8721), (2565, 8211), (2737, 7695), (2835, 7429), (2907, 7245), (3059, 6885), (3105, 6783), (3213, 6555), (3519, 5985), (3591, 5865), (3933, 5355), (4347, 4845)]