21793779

素因数分解:

$3^4\times 7^2\times {\mathrm{17}}^2\times {\mathrm{19}}^1$

素因数の和:79

約数の個数: 90

約数和(自身を含む): 42347580

約数和(自身を除く): 20553801

約数列:

[1, 3, 7, 9, 17, 19, 21, 27, 49, 51, 57, 63, 81, 119, 133, 147, 153, 171, 189, 289, 323, 357, 399, 441, 459, 513, 567, 833, 867, 931, 969, 1071, 1197, 1323, 1377, 1539, 2023, 2261, 2499, 2601, 2793, 2907, 3213, 3591, 3969, 5491, 6069, 6783, 7497, 7803, 8379, 8721, 9639, 10773, 14161, 15827, 16473, 18207, 20349, 22491, 23409, 25137, 26163, 38437, 42483, 47481, 49419, 54621, 61047, 67473, 75411, 115311, 127449, 142443, 148257, 163863, 183141, 269059, 345933, 382347, 427329, 444771, 807177, 1037799, 1147041, 1281987, 2421531, 3113397, 7264593, 21793779]

約数ペア:

[(1, 21793779), (3, 7264593), (7, 3113397), (9, 2421531), (17, 1281987), (19, 1147041), (21, 1037799), (27, 807177), (49, 444771), (51, 427329), (57, 382347), (63, 345933), (81, 269059), (119, 183141), (133, 163863), (147, 148257), (153, 142443), (171, 127449), (189, 115311), (289, 75411), (323, 67473), (357, 61047), (399, 54621), (441, 49419), (459, 47481), (513, 42483), (567, 38437), (833, 26163), (867, 25137), (931, 23409), (969, 22491), (1071, 20349), (1197, 18207), (1323, 16473), (1377, 15827), (1539, 14161), (2023, 10773), (2261, 9639), (2499, 8721), (2601, 8379), (2793, 7803), (2907, 7497), (3213, 6783), (3591, 6069), (3969, 5491)]