21246687

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1$

素因数の和:121

約数の個数: 96

約数和(自身を含む): 42172416

約数和(自身を除く): 20925729

約数列:

[1, 3, 7, 9, 11, 21, 23, 31, 33, 43, 63, 69, 77, 93, 99, 129, 161, 207, 217, 231, 253, 279, 301, 341, 387, 473, 483, 651, 693, 713, 759, 903, 989, 1023, 1333, 1419, 1449, 1771, 1953, 2139, 2277, 2387, 2709, 2967, 3069, 3311, 3999, 4257, 4991, 5313, 6417, 6923, 7161, 7843, 8901, 9331, 9933, 10879, 11997, 14663, 14973, 15939, 20769, 21483, 23529, 27993, 29799, 30659, 32637, 43989, 44919, 54901, 62307, 70587, 76153, 83979, 91977, 97911, 102641, 131967, 164703, 214613, 228459, 275931, 307923, 337249, 494109, 643839, 685377, 923769, 1011747, 1931517, 2360743, 3035241, 7082229, 21246687]

約数ペア:

[(1, 21246687), (3, 7082229), (7, 3035241), (9, 2360743), (11, 1931517), (21, 1011747), (23, 923769), (31, 685377), (33, 643839), (43, 494109), (63, 337249), (69, 307923), (77, 275931), (93, 228459), (99, 214613), (129, 164703), (161, 131967), (207, 102641), (217, 97911), (231, 91977), (253, 83979), (279, 76153), (301, 70587), (341, 62307), (387, 54901), (473, 44919), (483, 43989), (651, 32637), (693, 30659), (713, 29799), (759, 27993), (903, 23529), (989, 21483), (1023, 20769), (1333, 15939), (1419, 14973), (1449, 14663), (1771, 11997), (1953, 10879), (2139, 9933), (2277, 9331), (2387, 8901), (2709, 7843), (2967, 7161), (3069, 6923), (3311, 6417), (3999, 5313), (4257, 4991)]