78804532780

素因数分解:

$2^2\times 5^1\times {\mathrm{3940226639}}^1$

素因数の和:3940226648

約数の個数: 12

約数和(自身を含む): 165489518880

約数和(自身を除く): 86684986100

約数列:

[1, 2, 4, 5, 10, 20, 3940226639, 7880453278, 15760906556, 19701133195, 39402266390, 78804532780]

約数ペア:

[(1, 78804532780), (2, 39402266390), (4, 19701133195), (5, 15760906556), (10, 7880453278), (20, 3940226639)]