20920317

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{641}}^1$

素因数の和:721

約数の個数: 32

約数和(自身を含む): 32541696

約数和(自身を除く): 11621379

約数列:

[1, 3, 11, 23, 33, 43, 69, 129, 253, 473, 641, 759, 989, 1419, 1923, 2967, 7051, 10879, 14743, 21153, 27563, 32637, 44229, 82689, 162173, 303193, 486519, 633949, 909579, 1901847, 6973439, 20920317]

約数ペア:

[(1, 20920317), (3, 6973439), (11, 1901847), (23, 909579), (33, 633949), (43, 486519), (69, 303193), (129, 162173), (253, 82689), (473, 44229), (641, 32637), (759, 27563), (989, 21153), (1419, 14743), (1923, 10879), (2967, 7051)]