18917703

素因数分解:

$3^2\times 7^1\times {\mathrm{467}}^1\times {\mathrm{643}}^1$

素因数の和:1123

約数の個数: 24

約数和(自身を含む): 31344768

約数和(自身を除く): 12427065

約数列:

[1, 3, 7, 9, 21, 63, 467, 643, 1401, 1929, 3269, 4203, 4501, 5787, 9807, 13503, 29421, 40509, 300281, 900843, 2101967, 2702529, 6305901, 18917703]

約数ペア:

[(1, 18917703), (3, 6305901), (7, 2702529), (9, 2101967), (21, 900843), (63, 300281), (467, 40509), (643, 29421), (1401, 13503), (1929, 9807), (3269, 5787), (4203, 4501)]