18040720

素因数分解:

$2^4\times 5^1\times {\mathrm{225509}}^1$

素因数の和:225522

約数の個数: 20

約数和(自身を含む): 41944860

約数和(自身を除く): 23904140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 225509, 451018, 902036, 1127545, 1804072, 2255090, 3608144, 4510180, 9020360, 18040720]

約数ペア:

[(1, 18040720), (2, 9020360), (4, 4510180), (5, 3608144), (8, 2255090), (10, 1804072), (16, 1127545), (20, 902036), (40, 451018), (80, 225509)]