199985680

素因数分解:

$2^4\times 5^1\times {\mathrm{2499821}}^1$

素因数の和:2499834

約数の個数: 20

約数和(自身を含む): 464966892

約数和(自身を除く): 264981212

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2499821, 4999642, 9999284, 12499105, 19998568, 24998210, 39997136, 49996420, 99992840, 199985680]

約数ペア:

[(1, 199985680), (2, 99992840), (4, 49996420), (5, 39997136), (8, 24998210), (10, 19998568), (16, 12499105), (20, 9999284), (40, 4999642), (80, 2499821)]