21271376

素因数分解:

$2^4\times 7^1\times {\mathrm{257}}^1\times {\mathrm{739}}^1$

素因数の和:1011

約数の個数: 40

約数和(自身を含む): 47348160

約数和(自身を除く): 26076784

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 257, 514, 739, 1028, 1478, 1799, 2056, 2956, 3598, 4112, 5173, 5912, 7196, 10346, 11824, 14392, 20692, 28784, 41384, 82768, 189923, 379846, 759692, 1329461, 1519384, 2658922, 3038768, 5317844, 10635688, 21271376]

約数ペア:

[(1, 21271376), (2, 10635688), (4, 5317844), (7, 3038768), (8, 2658922), (14, 1519384), (16, 1329461), (28, 759692), (56, 379846), (112, 189923), (257, 82768), (514, 41384), (739, 28784), (1028, 20692), (1478, 14392), (1799, 11824), (2056, 10346), (2956, 7196), (3598, 5912), (4112, 5173)]