66721240

素因数分解:

$2^3\times 5^1\times {\mathrm{1668031}}^1$

素因数の和:1668042

約数の個数: 16

約数和(自身を含む): 150122880

約数和(自身を除く): 83401640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1668031, 3336062, 6672124, 8340155, 13344248, 16680310, 33360620, 66721240]

約数ペア:

[(1, 66721240), (2, 33360620), (4, 16680310), (5, 13344248), (8, 8340155), (10, 6672124), (20, 3336062), (40, 1668031)]