20990782

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{173}}^1$

素因数の和:328

約数の個数: 32

約数和(自身を含む): 34744320

約数和(自身を除く): 13753538

約数列:

[1, 2, 19, 31, 38, 62, 103, 173, 206, 346, 589, 1178, 1957, 3193, 3287, 3914, 5363, 6386, 6574, 10726, 17819, 35638, 60667, 101897, 121334, 203794, 338561, 552389, 677122, 1104778, 10495391, 20990782]

約数ペア:

[(1, 20990782), (2, 10495391), (19, 1104778), (31, 677122), (38, 552389), (62, 338561), (103, 203794), (173, 121334), (206, 101897), (346, 60667), (589, 35638), (1178, 17819), (1957, 10726), (3193, 6574), (3287, 6386), (3914, 5363)]