81702640

素因数分解:

$2^4\times 5^1\times {\mathrm{1021283}}^1$

素因数の和:1021296

約数の個数: 20

約数和(自身を含む): 189958824

約数和(自身を除く): 108256184

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1021283, 2042566, 4085132, 5106415, 8170264, 10212830, 16340528, 20425660, 40851320, 81702640]

約数ペア:

[(1, 81702640), (2, 40851320), (4, 20425660), (5, 16340528), (8, 10212830), (10, 8170264), (16, 5106415), (20, 4085132), (40, 2042566), (80, 1021283)]