19812723

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{593}}^1$

素因数の和:683

約数の個数: 32

約数和(自身を含む): 31781376

約数和(自身を除く): 11968653

約数列:

[1, 3, 7, 21, 37, 43, 111, 129, 259, 301, 593, 777, 903, 1591, 1779, 4151, 4773, 11137, 12453, 21941, 25499, 33411, 65823, 76497, 153587, 178493, 460761, 535479, 943463, 2830389, 6604241, 19812723]

約数ペア:

[(1, 19812723), (3, 6604241), (7, 2830389), (21, 943463), (37, 535479), (43, 460761), (111, 178493), (129, 153587), (259, 76497), (301, 65823), (593, 33411), (777, 25499), (903, 21941), (1591, 12453), (1779, 11137), (4151, 4773)]