20871213

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{113}}^1\times {\mathrm{193}}^1$

素因数の和:349

約数の個数: 32

約数和(自身を含む): 31847040

約数和(自身を除く): 10975827

約数列:

[1, 3, 11, 29, 33, 87, 113, 193, 319, 339, 579, 957, 1243, 2123, 3277, 3729, 5597, 6369, 9831, 16791, 21809, 36047, 61567, 65427, 108141, 184701, 239899, 632461, 719697, 1897383, 6957071, 20871213]

約数ペア:

[(1, 20871213), (3, 6957071), (11, 1897383), (29, 719697), (33, 632461), (87, 239899), (113, 184701), (193, 108141), (319, 65427), (339, 61567), (579, 36047), (957, 21809), (1243, 16791), (2123, 9831), (3277, 6369), (3729, 5597)]