164491280

素因数分解:

$2^4\times 5^1\times {\mathrm{2056141}}^1$

素因数の和:2056154

約数の個数: 20

約数和(自身を含む): 382442412

約数和(自身を除く): 217951132

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2056141, 4112282, 8224564, 10280705, 16449128, 20561410, 32898256, 41122820, 82245640, 164491280]

約数ペア:

[(1, 164491280), (2, 82245640), (4, 41122820), (5, 32898256), (8, 20561410), (10, 16449128), (16, 10280705), (20, 8224564), (40, 4112282), (80, 2056141)]