3991280

素因数分解:

$2^4\times 5^1\times {\mathrm{49891}}^1$

素因数の和:49904

約数の個数: 20

約数和(自身を含む): 9279912

約数和(自身を除く): 5288632

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 49891, 99782, 199564, 249455, 399128, 498910, 798256, 997820, 1995640, 3991280]

約数ペア:

[(1, 3991280), (2, 1995640), (4, 997820), (5, 798256), (8, 498910), (10, 399128), (16, 249455), (20, 199564), (40, 99782), (80, 49891)]