20528728

素因数分解:

$2^3\times {\mathrm{11}}^1\times {\mathrm{263}}^1\times {\mathrm{887}}^1$

素因数の和:1167

約数の個数: 32

約数和(自身を含む): 42197760

約数和(自身を除く): 21669032

約数列:

[1, 2, 4, 8, 11, 22, 44, 88, 263, 526, 887, 1052, 1774, 2104, 2893, 3548, 5786, 7096, 9757, 11572, 19514, 23144, 39028, 78056, 233281, 466562, 933124, 1866248, 2566091, 5132182, 10264364, 20528728]

約数ペア:

[(1, 20528728), (2, 10264364), (4, 5132182), (8, 2566091), (11, 1866248), (22, 933124), (44, 466562), (88, 233281), (263, 78056), (526, 39028), (887, 23144), (1052, 19514), (1774, 11572), (2104, 9757), (2893, 7096), (3548, 5786)]