21232240

素因数分解:

$2^4\times 5^1\times {\mathrm{265403}}^1$

素因数の和:265416

約数の個数: 20

約数和(自身を含む): 49365144

約数和(自身を除く): 28132904

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265403, 530806, 1061612, 1327015, 2123224, 2654030, 4246448, 5308060, 10616120, 21232240]

約数ペア:

[(1, 21232240), (2, 10616120), (4, 5308060), (5, 4246448), (8, 2654030), (10, 2123224), (16, 1327015), (20, 1061612), (40, 530806), (80, 265403)]