79840720

素因数分解:

$2^4\times 5^1\times {\mathrm{998009}}^1$

素因数の和:998022

約数の個数: 20

約数和(自身を含む): 185629860

約数和(自身を除く): 105789140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 998009, 1996018, 3992036, 4990045, 7984072, 9980090, 15968144, 19960180, 39920360, 79840720]

約数ペア:

[(1, 79840720), (2, 39920360), (4, 19960180), (5, 15968144), (8, 9980090), (10, 7984072), (16, 4990045), (20, 3992036), (40, 1996018), (80, 998009)]