281047820

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{197921}}^1$

素因数の和:198001

約数の個数: 24

約数和(自身を含む): 598516128

約数和(自身を除く): 317468308

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 197921, 395842, 791684, 989605, 1979210, 3958420, 14052391, 28104782, 56209564, 70261955, 140523910, 281047820]

約数ペア:

[(1, 281047820), (2, 140523910), (4, 70261955), (5, 56209564), (10, 28104782), (20, 14052391), (71, 3958420), (142, 1979210), (284, 989605), (355, 791684), (710, 395842), (1420, 197921)]