19718180

素因数分解:

$2^2\times 5^1\times {\mathrm{907}}^1\times {\mathrm{1087}}^1$

素因数の和:2003

約数の個数: 24

約数和(自身を含む): 41491968

約数和(自身を除く): 21773788

約数列:

[1, 2, 4, 5, 10, 20, 907, 1087, 1814, 2174, 3628, 4348, 4535, 5435, 9070, 10870, 18140, 21740, 985909, 1971818, 3943636, 4929545, 9859090, 19718180]

約数ペア:

[(1, 19718180), (2, 9859090), (4, 4929545), (5, 3943636), (10, 1971818), (20, 985909), (907, 21740), (1087, 18140), (1814, 10870), (2174, 9070), (3628, 5435), (4348, 4535)]