20968864

素因数分解:

$2^5\times 7^2\times {\mathrm{43}}^1\times {\mathrm{311}}^1$

素因数の和:378

約数の個数: 72

約数和(自身を含む): 49297248

約数和(自身を除く): 28328384

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 43, 49, 56, 86, 98, 112, 172, 196, 224, 301, 311, 344, 392, 602, 622, 688, 784, 1204, 1244, 1376, 1568, 2107, 2177, 2408, 2488, 4214, 4354, 4816, 4976, 8428, 8708, 9632, 9952, 13373, 15239, 16856, 17416, 26746, 30478, 33712, 34832, 53492, 60956, 67424, 69664, 93611, 106984, 121912, 187222, 213968, 243824, 374444, 427936, 487648, 655277, 748888, 1310554, 1497776, 2621108, 2995552, 5242216, 10484432, 20968864]

約数ペア:

[(1, 20968864), (2, 10484432), (4, 5242216), (7, 2995552), (8, 2621108), (14, 1497776), (16, 1310554), (28, 748888), (32, 655277), (43, 487648), (49, 427936), (56, 374444), (86, 243824), (98, 213968), (112, 187222), (172, 121912), (196, 106984), (224, 93611), (301, 69664), (311, 67424), (344, 60956), (392, 53492), (602, 34832), (622, 33712), (688, 30478), (784, 26746), (1204, 17416), (1244, 16856), (1376, 15239), (1568, 13373), (2107, 9952), (2177, 9632), (2408, 8708), (2488, 8428), (4214, 4976), (4354, 4816)]