21309904

素因数分解:

$2^4\times 7^3\times {\mathrm{11}}^1\times {\mathrm{353}}^1$

素因数の和:393

約数の個数: 80

約数和(自身を含む): 52675200

約数和(自身を除く): 31365296

約数列:

[1, 2, 4, 7, 8, 11, 14, 16, 22, 28, 44, 49, 56, 77, 88, 98, 112, 154, 176, 196, 308, 343, 353, 392, 539, 616, 686, 706, 784, 1078, 1232, 1372, 1412, 2156, 2471, 2744, 2824, 3773, 3883, 4312, 4942, 5488, 5648, 7546, 7766, 8624, 9884, 15092, 15532, 17297, 19768, 27181, 30184, 31064, 34594, 39536, 54362, 60368, 62128, 69188, 108724, 121079, 138376, 190267, 217448, 242158, 276752, 380534, 434896, 484316, 761068, 968632, 1331869, 1522136, 1937264, 2663738, 3044272, 5327476, 10654952, 21309904]

約数ペア:

[(1, 21309904), (2, 10654952), (4, 5327476), (7, 3044272), (8, 2663738), (11, 1937264), (14, 1522136), (16, 1331869), (22, 968632), (28, 761068), (44, 484316), (49, 434896), (56, 380534), (77, 276752), (88, 242158), (98, 217448), (112, 190267), (154, 138376), (176, 121079), (196, 108724), (308, 69188), (343, 62128), (353, 60368), (392, 54362), (539, 39536), (616, 34594), (686, 31064), (706, 30184), (784, 27181), (1078, 19768), (1232, 17297), (1372, 15532), (1412, 15092), (2156, 9884), (2471, 8624), (2744, 7766), (2824, 7546), (3773, 5648), (3883, 5488), (4312, 4942)]