2009200720

素因数分解:

$2^4\times 5^1\times {\mathrm{25115009}}^1$

素因数の和:25115022

約数の個数: 20

約数和(自身を含む): 4671391860

約数和(自身を除く): 2662191140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 25115009, 50230018, 100460036, 125575045, 200920072, 251150090, 401840144, 502300180, 1004600360, 2009200720]

約数ペア:

[(1, 2009200720), (2, 1004600360), (4, 502300180), (5, 401840144), (8, 251150090), (10, 200920072), (16, 125575045), (20, 100460036), (40, 50230018), (80, 25115009)]