20581040

素因数分解:

$2^4\times 5^1\times {\mathrm{257263}}^1$

素因数の和:257276

約数の個数: 20

約数和(自身を含む): 47851104

約数和(自身を除く): 27270064

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 257263, 514526, 1029052, 1286315, 2058104, 2572630, 4116208, 5145260, 10290520, 20581040]

約数ペア:

[(1, 20581040), (2, 10290520), (4, 5145260), (5, 4116208), (8, 2572630), (10, 2058104), (16, 1286315), (20, 1029052), (40, 514526), (80, 257263)]