19997901

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{9619}}^1$

素因数の和:9646

約数の個数: 32

約数和(自身を含む): 36940800

約数和(自身を除く): 16942899

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 63, 77, 99, 189, 231, 297, 693, 2079, 9619, 28857, 67333, 86571, 105809, 201999, 259713, 317427, 605997, 740663, 952281, 1817991, 2221989, 2856843, 6665967, 19997901]

約数ペア:

[(1, 19997901), (3, 6665967), (7, 2856843), (9, 2221989), (11, 1817991), (21, 952281), (27, 740663), (33, 605997), (63, 317427), (77, 259713), (99, 201999), (189, 105809), (231, 86571), (297, 67333), (693, 28857), (2079, 9619)]