8720290

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{21269}}^1$

素因数の和:21317

約数の個数: 16

約数和(自身を含む): 16080120

約数和(自身を除く): 7359830

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 21269, 42538, 106345, 212690, 872029, 1744058, 4360145, 8720290]

約数ペア:

[(1, 8720290), (2, 4360145), (5, 1744058), (10, 872029), (41, 212690), (82, 106345), (205, 42538), (410, 21269)]