21262040

素因数分解:

$2^3\times 5^1\times {\mathrm{531551}}^1$

素因数の和:531562

約数の個数: 16

約数和(自身を含む): 47839680

約数和(自身を除く): 26577640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 531551, 1063102, 2126204, 2657755, 4252408, 5315510, 10631020, 21262040]

約数ペア:

[(1, 21262040), (2, 10631020), (4, 5315510), (5, 4252408), (8, 2657755), (10, 2126204), (20, 1063102), (40, 531551)]