20987055

素因数分解:

$3^2\times 5^1\times {\mathrm{331}}^1\times {\mathrm{1409}}^1$

素因数の和:1751

約数の個数: 24

約数和(自身を含む): 36513360

約数和(自身を除く): 15526305

約数列:

[1, 3, 5, 9, 15, 45, 331, 993, 1409, 1655, 2979, 4227, 4965, 7045, 12681, 14895, 21135, 63405, 466379, 1399137, 2331895, 4197411, 6995685, 20987055]

約数ペア:

[(1, 20987055), (3, 6995685), (5, 4197411), (9, 2331895), (15, 1399137), (45, 466379), (331, 63405), (993, 21135), (1409, 14895), (1655, 12681), (2979, 7045), (4227, 4965)]