21039669

素因数分解:

$3^6\times 7^2\times {\mathrm{19}}^1\times {\mathrm{31}}^1$

素因数の和:82

約数の個数: 84

約数和(自身を含む): 39872640

約数和(自身を除く): 18832971

約数列:

[1, 3, 7, 9, 19, 21, 27, 31, 49, 57, 63, 81, 93, 133, 147, 171, 189, 217, 243, 279, 399, 441, 513, 567, 589, 651, 729, 837, 931, 1197, 1323, 1519, 1539, 1701, 1767, 1953, 2511, 2793, 3591, 3969, 4123, 4557, 4617, 5103, 5301, 5859, 7533, 8379, 10773, 11907, 12369, 13671, 13851, 15903, 17577, 22599, 25137, 28861, 32319, 35721, 37107, 41013, 47709, 52731, 75411, 86583, 96957, 111321, 123039, 143127, 158193, 226233, 259749, 333963, 369117, 429381, 678699, 779247, 1001889, 1107351, 2337741, 3005667, 7013223, 21039669]

約数ペア:

[(1, 21039669), (3, 7013223), (7, 3005667), (9, 2337741), (19, 1107351), (21, 1001889), (27, 779247), (31, 678699), (49, 429381), (57, 369117), (63, 333963), (81, 259749), (93, 226233), (133, 158193), (147, 143127), (171, 123039), (189, 111321), (217, 96957), (243, 86583), (279, 75411), (399, 52731), (441, 47709), (513, 41013), (567, 37107), (589, 35721), (651, 32319), (729, 28861), (837, 25137), (931, 22599), (1197, 17577), (1323, 15903), (1519, 13851), (1539, 13671), (1701, 12369), (1767, 11907), (1953, 10773), (2511, 8379), (2793, 7533), (3591, 5859), (3969, 5301), (4123, 5103), (4557, 4617)]