7977291220

素因数分解:

$2^2\times 5^1\times {\mathrm{398864561}}^1$

素因数の和:398864570

約数の個数: 12

約数和(自身を含む): 16752311604

約数和(自身を除く): 8775020384

約数列:

[1, 2, 4, 5, 10, 20, 398864561, 797729122, 1595458244, 1994322805, 3988645610, 7977291220]

約数ペア:

[(1, 7977291220), (2, 3988645610), (4, 1994322805), (5, 1595458244), (10, 797729122), (20, 398864561)]