20681409

素因数分解:

$3^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{619}}^1$

素因数の和:709

約数の個数: 32

約数和(自身を含む): 33172480

約数和(自身を除く): 12491071

約数列:

[1, 3, 7, 21, 37, 43, 111, 129, 259, 301, 619, 777, 903, 1591, 1857, 4333, 4773, 11137, 12999, 22903, 26617, 33411, 68709, 79851, 160321, 186319, 480963, 558957, 984829, 2954487, 6893803, 20681409]

約数ペア:

[(1, 20681409), (3, 6893803), (7, 2954487), (21, 984829), (37, 558957), (43, 480963), (111, 186319), (129, 160321), (259, 79851), (301, 68709), (619, 33411), (777, 26617), (903, 22903), (1591, 12999), (1857, 11137), (4333, 4773)]