12800720

素因数分解:

$2^4\times 5^1\times {\mathrm{160009}}^1$

素因数の和:160022

約数の個数: 20

約数和(自身を含む): 29761860

約数和(自身を除く): 16961140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 160009, 320018, 640036, 800045, 1280072, 1600090, 2560144, 3200180, 6400360, 12800720]

約数ペア:

[(1, 12800720), (2, 6400360), (4, 3200180), (5, 2560144), (8, 1600090), (10, 1280072), (16, 800045), (20, 640036), (40, 320018), (80, 160009)]