79997860

素因数分解:

$2^2\times 5^1\times {\mathrm{3999893}}^1$

素因数の和:3999902

約数の個数: 12

約数和(自身を含む): 167995548

約数和(自身を除く): 87997688

約数列:

[1, 2, 4, 5, 10, 20, 3999893, 7999786, 15999572, 19999465, 39998930, 79997860]

約数ペア:

[(1, 79997860), (2, 39998930), (4, 19999465), (5, 15999572), (10, 7999786), (20, 3999893)]