20689528

素因数分解:

$2^3\times {\mathrm{29}}^1\times {\mathrm{257}}^1\times {\mathrm{347}}^1$

素因数の和:639

約数の個数: 32

約数和(自身を含む): 40402800

約数和(自身を除く): 19713272

約数列:

[1, 2, 4, 8, 29, 58, 116, 232, 257, 347, 514, 694, 1028, 1388, 2056, 2776, 7453, 10063, 14906, 20126, 29812, 40252, 59624, 80504, 89179, 178358, 356716, 713432, 2586191, 5172382, 10344764, 20689528]

約数ペア:

[(1, 20689528), (2, 10344764), (4, 5172382), (8, 2586191), (29, 713432), (58, 356716), (116, 178358), (232, 89179), (257, 80504), (347, 59624), (514, 40252), (694, 29812), (1028, 20126), (1388, 14906), (2056, 10063), (2776, 7453)]