21278208

素因数分解:

$2^9\times 3^1\times 7^1\times {\mathrm{1979}}^1$

素因数の和:2007

約数の個数: 80

約数和(自身を含む): 64817280

約数和(自身を除く): 43539072

約数列:

[1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 32, 42, 48, 56, 64, 84, 96, 112, 128, 168, 192, 224, 256, 336, 384, 448, 512, 672, 768, 896, 1344, 1536, 1792, 1979, 2688, 3584, 3958, 5376, 5937, 7916, 10752, 11874, 13853, 15832, 23748, 27706, 31664, 41559, 47496, 55412, 63328, 83118, 94992, 110824, 126656, 166236, 189984, 221648, 253312, 332472, 379968, 443296, 506624, 664944, 759936, 886592, 1013248, 1329888, 1519872, 1773184, 2659776, 3039744, 3546368, 5319552, 7092736, 10639104, 21278208]

約数ペア:

[(1, 21278208), (2, 10639104), (3, 7092736), (4, 5319552), (6, 3546368), (7, 3039744), (8, 2659776), (12, 1773184), (14, 1519872), (16, 1329888), (21, 1013248), (24, 886592), (28, 759936), (32, 664944), (42, 506624), (48, 443296), (56, 379968), (64, 332472), (84, 253312), (96, 221648), (112, 189984), (128, 166236), (168, 126656), (192, 110824), (224, 94992), (256, 83118), (336, 63328), (384, 55412), (448, 47496), (512, 41559), (672, 31664), (768, 27706), (896, 23748), (1344, 15832), (1536, 13853), (1792, 11874), (1979, 10752), (2688, 7916), (3584, 5937), (3958, 5376)]