21166160

素因数分解:

$2^4\times 5^1\times {\mathrm{264577}}^1$

素因数の和:264590

約数の個数: 20

約数和(自身を含む): 49211508

約数和(自身を除く): 28045348

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 264577, 529154, 1058308, 1322885, 2116616, 2645770, 4233232, 5291540, 10583080, 21166160]

約数ペア:

[(1, 21166160), (2, 10583080), (4, 5291540), (5, 4233232), (8, 2645770), (10, 2116616), (16, 1322885), (20, 1058308), (40, 529154), (80, 264577)]