80380360

素因数分解:

$2^3\times 5^1\times {\mathrm{2009509}}^1$

素因数の和:2009520

約数の個数: 16

約数和(自身を含む): 180855900

約数和(自身を除く): 100475540

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 2009509, 4019018, 8038036, 10047545, 16076072, 20095090, 40190180, 80380360]

約数ペア:

[(1, 80380360), (2, 40190180), (4, 20095090), (5, 16076072), (8, 10047545), (10, 8038036), (20, 4019018), (40, 2009509)]