78916520

素因数分解:

$2^3\times 5^1\times {\mathrm{1972913}}^1$

素因数の和:1972924

約数の個数: 16

約数和(自身を含む): 177562260

約数和(自身を除く): 98645740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1972913, 3945826, 7891652, 9864565, 15783304, 19729130, 39458260, 78916520]

約数ペア:

[(1, 78916520), (2, 39458260), (4, 19729130), (5, 15783304), (8, 9864565), (10, 7891652), (20, 3945826), (40, 1972913)]