21425481

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{719}}^1$

素因数の和:786

約数の個数: 48

約数和(自身を含む): 39536640

約数和(自身を除く): 18111159

約数列:

[1, 3, 7, 9, 11, 21, 33, 43, 63, 77, 99, 129, 231, 301, 387, 473, 693, 719, 903, 1419, 2157, 2709, 3311, 4257, 5033, 6471, 7909, 9933, 15099, 23727, 29799, 30917, 45297, 55363, 71181, 92751, 166089, 216419, 278253, 340087, 498267, 649257, 1020261, 1947771, 2380609, 3060783, 7141827, 21425481]

約数ペア:

[(1, 21425481), (3, 7141827), (7, 3060783), (9, 2380609), (11, 1947771), (21, 1020261), (33, 649257), (43, 498267), (63, 340087), (77, 278253), (99, 216419), (129, 166089), (231, 92751), (301, 71181), (387, 55363), (473, 45297), (693, 30917), (719, 29799), (903, 23727), (1419, 15099), (2157, 9933), (2709, 7909), (3311, 6471), (4257, 5033)]