199999760

素因数分解:

$2^4\times 5^1\times {\mathrm{2499997}}^1$

素因数の和:2500010

約数の個数: 20

約数和(自身を含む): 464999628

約数和(自身を除く): 264999868

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2499997, 4999994, 9999988, 12499985, 19999976, 24999970, 39999952, 49999940, 99999880, 199999760]

約数ペア:

[(1, 199999760), (2, 99999880), (4, 49999940), (5, 39999952), (8, 24999970), (10, 19999976), (16, 12499985), (20, 9999988), (40, 4999994), (80, 2499997)]