21000547708

素因数分解:

$2^2\times 7^1\times {\mathrm{47}}^2\times {\mathrm{163}}^1\times {\mathrm{2083}}^1$

素因数の和:2351

約数の個数: 72

約数和(自身を含む): 43197752192

約数和(自身を除く): 22197204484

約数列:

[1, 2, 4, 7, 14, 28, 47, 94, 163, 188, 326, 329, 652, 658, 1141, 1316, 2083, 2209, 2282, 4166, 4418, 4564, 7661, 8332, 8836, 14581, 15322, 15463, 29162, 30644, 30926, 53627, 58324, 61852, 97901, 107254, 195802, 214508, 339529, 360067, 391604, 679058, 685307, 720134, 1358116, 1370614, 1440268, 2376703, 2520469, 2741228, 4601347, 4753406, 5040938, 9202694, 9506812, 10081876, 15957863, 18405388, 31915726, 32209429, 63831452, 64418858, 111705041, 128837716, 223410082, 446820164, 750019561, 1500039122, 3000078244, 5250136927, 10500273854, 21000547708]

約数ペア:

[(1, 21000547708), (2, 10500273854), (4, 5250136927), (7, 3000078244), (14, 1500039122), (28, 750019561), (47, 446820164), (94, 223410082), (163, 128837716), (188, 111705041), (326, 64418858), (329, 63831452), (652, 32209429), (658, 31915726), (1141, 18405388), (1316, 15957863), (2083, 10081876), (2209, 9506812), (2282, 9202694), (4166, 5040938), (4418, 4753406), (4564, 4601347), (7661, 2741228), (8332, 2520469), (8836, 2376703), (14581, 1440268), (15322, 1370614), (15463, 1358116), (29162, 720134), (30644, 685307), (30926, 679058), (53627, 391604), (58324, 360067), (61852, 339529), (97901, 214508), (107254, 195802)]