21257764

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{167}}^1\times {\mathrm{263}}^1$

素因数の和:456

約数の個数: 36

約数和(自身を含む): 41291712

約数和(自身を除く): 20033948

約数列:

[1, 2, 4, 11, 22, 44, 121, 167, 242, 263, 334, 484, 526, 668, 1052, 1837, 2893, 3674, 5786, 7348, 11572, 20207, 31823, 40414, 43921, 63646, 80828, 87842, 127292, 175684, 483131, 966262, 1932524, 5314441, 10628882, 21257764]

約数ペア:

[(1, 21257764), (2, 10628882), (4, 5314441), (11, 1932524), (22, 966262), (44, 483131), (121, 175684), (167, 127292), (242, 87842), (263, 80828), (334, 63646), (484, 43921), (526, 40414), (668, 31823), (1052, 20207), (1837, 11572), (2893, 7348), (3674, 5786)]