17800220

素因数分解:

$2^2\times 5^1\times {\mathrm{890011}}^1$

素因数の和:890020

約数の個数: 12

約数和(自身を含む): 37380504

約数和(自身を除く): 19580284

約数列:

[1, 2, 4, 5, 10, 20, 890011, 1780022, 3560044, 4450055, 8900110, 17800220]

約数ペア:

[(1, 17800220), (2, 8900110), (4, 4450055), (5, 3560044), (10, 1780022), (20, 890011)]