39978320

素因数分解:

$2^4\times 5^1\times {\mathrm{499729}}^1$

素因数の和:499742

約数の個数: 20

約数和(自身を含む): 92949780

約数和(自身を除く): 52971460

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 499729, 999458, 1998916, 2498645, 3997832, 4997290, 7995664, 9994580, 19989160, 39978320]

約数ペア:

[(1, 39978320), (2, 19989160), (4, 9994580), (5, 7995664), (8, 4997290), (10, 3997832), (16, 2498645), (20, 1998916), (40, 999458), (80, 499729)]