20957168

素因数分解:

$2^4\times {\mathrm{43}}^1\times {\mathrm{83}}^1\times {\mathrm{367}}^1$

素因数の和:501

約数の個数: 40

約数和(自身を含む): 42163968

約数和(自身を除く): 21206800

約数列:

[1, 2, 4, 8, 16, 43, 83, 86, 166, 172, 332, 344, 367, 664, 688, 734, 1328, 1468, 2936, 3569, 5872, 7138, 14276, 15781, 28552, 30461, 31562, 57104, 60922, 63124, 121844, 126248, 243688, 252496, 487376, 1309823, 2619646, 5239292, 10478584, 20957168]

約数ペア:

[(1, 20957168), (2, 10478584), (4, 5239292), (8, 2619646), (16, 1309823), (43, 487376), (83, 252496), (86, 243688), (166, 126248), (172, 121844), (332, 63124), (344, 60922), (367, 57104), (664, 31562), (688, 30461), (734, 28552), (1328, 15781), (1468, 14276), (2936, 7138), (3569, 5872)]