399291215920

素因数分解:

$2^4\times 5^1\times {\mathrm{4991140199}}^1$

素因数の和:4991140212

約数の個数: 20

約数和(自身を含む): 928352077200

約数和(自身を除く): 529060861280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 4991140199, 9982280398, 19964560796, 24955700995, 39929121592, 49911401990, 79858243184, 99822803980, 199645607960, 399291215920]

約数ペア:

[(1, 399291215920), (2, 199645607960), (4, 99822803980), (5, 79858243184), (8, 49911401990), (10, 39929121592), (16, 24955700995), (20, 19964560796), (40, 9982280398), (80, 4991140199)]