21988701

素因数分解:

$3^2\times 7^3\times {\mathrm{17}}^1\times {\mathrm{419}}^1$

素因数の和:463

約数の個数: 48

約数和(自身を含む): 39312000

約数和(自身を除く): 17323299

約数列:

[1, 3, 7, 9, 17, 21, 49, 51, 63, 119, 147, 153, 343, 357, 419, 441, 833, 1029, 1071, 1257, 2499, 2933, 3087, 3771, 5831, 7123, 7497, 8799, 17493, 20531, 21369, 26397, 49861, 52479, 61593, 64107, 143717, 149583, 184779, 349027, 431151, 448749, 1047081, 1293453, 2443189, 3141243, 7329567, 21988701]

約数ペア:

[(1, 21988701), (3, 7329567), (7, 3141243), (9, 2443189), (17, 1293453), (21, 1047081), (49, 448749), (51, 431151), (63, 349027), (119, 184779), (147, 149583), (153, 143717), (343, 64107), (357, 61593), (419, 52479), (441, 49861), (833, 26397), (1029, 21369), (1071, 20531), (1257, 17493), (2499, 8799), (2933, 7497), (3087, 7123), (3771, 5831)]