21491312

素因数分解:

$2^4\times {\mathrm{109}}^1\times {\mathrm{12323}}^1$

素因数の和:12440

約数の個数: 20

約数和(自身を含む): 42024840

約数和(自身を除く): 20533528

約数列:

[1, 2, 4, 8, 16, 109, 218, 436, 872, 1744, 12323, 24646, 49292, 98584, 197168, 1343207, 2686414, 5372828, 10745656, 21491312]

約数ペア:

[(1, 21491312), (2, 10745656), (4, 5372828), (8, 2686414), (16, 1343207), (109, 197168), (218, 98584), (436, 49292), (872, 24646), (1744, 12323)]