20128472

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{643}}^1$

素因数の和:712

約数の個数: 64

約数和(自身を含む): 47604480

約数和(自身を除く): 27476008

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 43, 52, 56, 86, 91, 104, 172, 182, 301, 344, 364, 559, 602, 643, 728, 1118, 1204, 1286, 2236, 2408, 2572, 3913, 4472, 4501, 5144, 7826, 8359, 9002, 15652, 16718, 18004, 27649, 31304, 33436, 36008, 55298, 58513, 66872, 110596, 117026, 193543, 221192, 234052, 359437, 387086, 468104, 718874, 774172, 1437748, 1548344, 2516059, 2875496, 5032118, 10064236, 20128472]

約数ペア:

[(1, 20128472), (2, 10064236), (4, 5032118), (7, 2875496), (8, 2516059), (13, 1548344), (14, 1437748), (26, 774172), (28, 718874), (43, 468104), (52, 387086), (56, 359437), (86, 234052), (91, 221192), (104, 193543), (172, 117026), (182, 110596), (301, 66872), (344, 58513), (364, 55298), (559, 36008), (602, 33436), (643, 31304), (728, 27649), (1118, 18004), (1204, 16718), (1286, 15652), (2236, 9002), (2408, 8359), (2572, 7826), (3913, 5144), (4472, 4501)]