15939640

素因数分解:

$2^3\times 5^1\times {\mathrm{398491}}^1$

素因数の和:398502

約数の個数: 16

約数和(自身を含む): 35864280

約数和(自身を除く): 19924640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 398491, 796982, 1593964, 1992455, 3187928, 3984910, 7969820, 15939640]

約数ペア:

[(1, 15939640), (2, 7969820), (4, 3984910), (5, 3187928), (8, 1992455), (10, 1593964), (20, 796982), (40, 398491)]