208520720

素因数分解:

$2^4\times 5^1\times {\mathrm{2606509}}^1$

素因数の和:2606522

約数の個数: 20

約数和(自身を含む): 484810860

約数和(自身を除く): 276290140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2606509, 5213018, 10426036, 13032545, 20852072, 26065090, 41704144, 52130180, 104260360, 208520720]

約数ペア:

[(1, 208520720), (2, 104260360), (4, 52130180), (5, 41704144), (8, 26065090), (10, 20852072), (16, 13032545), (20, 10426036), (40, 5213018), (80, 2606509)]