19993281

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{2111}}^1$

素因数の和:2173

約数の個数: 32

約数和(自身を含む): 34062336

約数和(自身を除く): 14069055

約数列:

[1, 3, 7, 11, 21, 33, 41, 77, 123, 231, 287, 451, 861, 1353, 2111, 3157, 6333, 9471, 14777, 23221, 44331, 69663, 86551, 162547, 259653, 487641, 605857, 952061, 1817571, 2856183, 6664427, 19993281]

約数ペア:

[(1, 19993281), (3, 6664427), (7, 2856183), (11, 1817571), (21, 952061), (33, 605857), (41, 487641), (77, 259653), (123, 162547), (231, 86551), (287, 69663), (451, 44331), (861, 23221), (1353, 14777), (2111, 9471), (3157, 6333)]