19700828

素因数分解:

$2^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{131}}^2$

素因数の和:314

約数の個数: 36

約数和(自身を含む): 40673136

約数和(自身を除く): 20972308

約数列:

[1, 2, 4, 7, 14, 28, 41, 82, 131, 164, 262, 287, 524, 574, 917, 1148, 1834, 3668, 5371, 10742, 17161, 21484, 34322, 37597, 68644, 75194, 120127, 150388, 240254, 480508, 703601, 1407202, 2814404, 4925207, 9850414, 19700828]

約数ペア:

[(1, 19700828), (2, 9850414), (4, 4925207), (7, 2814404), (14, 1407202), (28, 703601), (41, 480508), (82, 240254), (131, 150388), (164, 120127), (262, 75194), (287, 68644), (524, 37597), (574, 34322), (917, 21484), (1148, 17161), (1834, 10742), (3668, 5371)]