21477812

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{193}}^1\times {\mathrm{647}}^1$

素因数の和:887

約数の個数: 24

約数和(自身を含む): 38719296

約数和(自身を除く): 17241484

約数列:

[1, 2, 4, 43, 86, 172, 193, 386, 647, 772, 1294, 2588, 8299, 16598, 27821, 33196, 55642, 111284, 124871, 249742, 499484, 5369453, 10738906, 21477812]

約数ペア:

[(1, 21477812), (2, 10738906), (4, 5369453), (43, 499484), (86, 249742), (172, 124871), (193, 111284), (386, 55642), (647, 33196), (772, 27821), (1294, 16598), (2588, 8299)]