2560040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{41}}^1\times {\mathrm{223}}^1$

素因数の和:282

約数の個数: 64

約数和(自身を含む): 6773760

約数和(自身を除く): 4213720

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 41, 56, 70, 82, 140, 164, 205, 223, 280, 287, 328, 410, 446, 574, 820, 892, 1115, 1148, 1435, 1561, 1640, 1784, 2230, 2296, 2870, 3122, 4460, 5740, 6244, 7805, 8920, 9143, 11480, 12488, 15610, 18286, 31220, 36572, 45715, 62440, 64001, 73144, 91430, 128002, 182860, 256004, 320005, 365720, 512008, 640010, 1280020, 2560040]

約数ペア:

[(1, 2560040), (2, 1280020), (4, 640010), (5, 512008), (7, 365720), (8, 320005), (10, 256004), (14, 182860), (20, 128002), (28, 91430), (35, 73144), (40, 64001), (41, 62440), (56, 45715), (70, 36572), (82, 31220), (140, 18286), (164, 15610), (205, 12488), (223, 11480), (280, 9143), (287, 8920), (328, 7805), (410, 6244), (446, 5740), (574, 4460), (820, 3122), (892, 2870), (1115, 2296), (1148, 2230), (1435, 1784), (1561, 1640)]