99991720

素因数分解:

$2^3\times 5^1\times {\mathrm{2499793}}^1$

素因数の和:2499804

約数の個数: 16

約数和(自身を含む): 224981460

約数和(自身を除く): 124989740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2499793, 4999586, 9999172, 12498965, 19998344, 24997930, 49995860, 99991720]

約数ペア:

[(1, 99991720), (2, 49995860), (4, 24997930), (5, 19998344), (8, 12498965), (10, 9999172), (20, 4999586), (40, 2499793)]