199988720

素因数分解:

$2^4\times 5^1\times {\mathrm{2499859}}^1$

素因数の和:2499872

約数の個数: 20

約数和(自身を含む): 464973960

約数和(自身を除く): 264985240

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2499859, 4999718, 9999436, 12499295, 19998872, 24998590, 39997744, 49997180, 99994360, 199988720]

約数ペア:

[(1, 199988720), (2, 99994360), (4, 49997180), (5, 39997744), (8, 24998590), (10, 19998872), (16, 12499295), (20, 9999436), (40, 4999718), (80, 2499859)]