20804265

素因数分解:

$3^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{719}}^1$

素因数の和:1373

約数の個数: 24

約数和(自身を含む): 36167040

約数和(自身を除く): 15362775

約数列:

[1, 3, 5, 9, 15, 45, 643, 719, 1929, 2157, 3215, 3595, 5787, 6471, 9645, 10785, 28935, 32355, 462317, 1386951, 2311585, 4160853, 6934755, 20804265]

約数ペア:

[(1, 20804265), (3, 6934755), (5, 4160853), (9, 2311585), (15, 1386951), (45, 462317), (643, 32355), (719, 28935), (1929, 10785), (2157, 9645), (3215, 6471), (3595, 5787)]