80240180

素因数分解:

$2^2\times 5^1\times {\mathrm{2003}}^2$

素因数の和:4015

約数の個数: 18

約数和(自身を含む): 168588546

約数和(自身を除く): 88348366

約数列:

[1, 2, 4, 5, 10, 20, 2003, 4006, 8012, 10015, 20030, 40060, 4012009, 8024018, 16048036, 20060045, 40120090, 80240180]

約数ペア:

[(1, 80240180), (2, 40120090), (4, 20060045), (5, 16048036), (10, 8024018), (20, 4012009), (2003, 40060), (4006, 20030), (8012, 10015)]