18009999

素因数分解:

$3^3\times 7^2\times {\mathrm{13613}}^1$

素因数の和:13636

約数の個数: 24

約数和(自身を含む): 31039920

約数和(自身を除く): 13029921

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 13613, 40839, 95291, 122517, 285873, 367551, 667037, 857619, 2001111, 2572857, 6003333, 18009999]

約数ペア:

[(1, 18009999), (3, 6003333), (7, 2572857), (9, 2001111), (21, 857619), (27, 667037), (49, 367551), (63, 285873), (147, 122517), (189, 95291), (441, 40839), (1323, 13613)]