21262840

素因数分解:

$2^3\times 5^1\times {\mathrm{531571}}^1$

素因数の和:531582

約数の個数: 16

約数和(自身を含む): 47841480

約数和(自身を除く): 26578640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 531571, 1063142, 2126284, 2657855, 4252568, 5315710, 10631420, 21262840]

約数ペア:

[(1, 21262840), (2, 10631420), (4, 5315710), (5, 4252568), (8, 2657855), (10, 2126284), (20, 1063142), (40, 531571)]