28400720

素因数分解:

$2^4\times 5^1\times {\mathrm{355009}}^1$

素因数の和:355022

約数の個数: 20

約数和(自身を含む): 66031860

約数和(自身を除く): 37631140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 355009, 710018, 1420036, 1775045, 2840072, 3550090, 5680144, 7100180, 14200360, 28400720]

約数ペア:

[(1, 28400720), (2, 14200360), (4, 7100180), (5, 5680144), (8, 3550090), (10, 2840072), (16, 1775045), (20, 1420036), (40, 710018), (80, 355009)]