19990289

素因数分解:

${\mathrm{11}}^3\times {\mathrm{23}}^1\times {\mathrm{653}}^1$

素因数の和:709

約数の個数: 16

約数和(自身を含む): 22978944

約数和(自身を除く): 2988655

約数列:

[1, 11, 23, 121, 253, 653, 1331, 2783, 7183, 15019, 30613, 79013, 165209, 869143, 1817299, 19990289]

約数ペア:

[(1, 19990289), (11, 1817299), (23, 869143), (121, 165209), (253, 79013), (653, 30613), (1331, 15019), (2783, 7183)]