21318656

素因数分解:

$2^{10}\times {\mathrm{109}}^1\times {\mathrm{191}}^1$

素因数の和:320

約数の個数: 44

約数和(自身を含む): 43232640

約数和(自身を除く): 21913984

約数列:

[1, 2, 4, 8, 16, 32, 64, 109, 128, 191, 218, 256, 382, 436, 512, 764, 872, 1024, 1528, 1744, 3056, 3488, 6112, 6976, 12224, 13952, 20819, 24448, 27904, 41638, 48896, 55808, 83276, 97792, 111616, 166552, 195584, 333104, 666208, 1332416, 2664832, 5329664, 10659328, 21318656]

約数ペア:

[(1, 21318656), (2, 10659328), (4, 5329664), (8, 2664832), (16, 1332416), (32, 666208), (64, 333104), (109, 195584), (128, 166552), (191, 111616), (218, 97792), (256, 83276), (382, 55808), (436, 48896), (512, 41638), (764, 27904), (872, 24448), (1024, 20819), (1528, 13952), (1744, 12224), (3056, 6976), (3488, 6112)]