21721648

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{6143}}^1$

素因数の和:6181

約数の個数: 40

約数和(自身を含む): 47996928

約数和(自身を除く): 26275280

約数列:

[1, 2, 4, 8, 13, 16, 17, 26, 34, 52, 68, 104, 136, 208, 221, 272, 442, 884, 1768, 3536, 6143, 12286, 24572, 49144, 79859, 98288, 104431, 159718, 208862, 319436, 417724, 638872, 835448, 1277744, 1357603, 1670896, 2715206, 5430412, 10860824, 21721648]

約数ペア:

[(1, 21721648), (2, 10860824), (4, 5430412), (8, 2715206), (13, 1670896), (16, 1357603), (17, 1277744), (26, 835448), (34, 638872), (52, 417724), (68, 319436), (104, 208862), (136, 159718), (208, 104431), (221, 98288), (272, 79859), (442, 49144), (884, 24572), (1768, 12286), (3536, 6143)]