3999440

素因数分解:

$2^4\times 5^1\times {\mathrm{49993}}^1$

素因数の和:50006

約数の個数: 20

約数和(自身を含む): 9298884

約数和(自身を除く): 5299444

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 49993, 99986, 199972, 249965, 399944, 499930, 799888, 999860, 1999720, 3999440]

約数ペア:

[(1, 3999440), (2, 1999720), (4, 999860), (5, 799888), (8, 499930), (10, 399944), (16, 249965), (20, 199972), (40, 99986), (80, 49993)]