204400720

素因数分解:

$2^4\times 5^1\times {\mathrm{2555009}}^1$

素因数の和:2555022

約数の個数: 20

約数和(自身を含む): 475231860

約数和(自身を除く): 270831140

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 2555009, 5110018, 10220036, 12775045, 20440072, 25550090, 40880144, 51100180, 102200360, 204400720]

約数ペア:

[(1, 204400720), (2, 102200360), (4, 51100180), (5, 40880144), (8, 25550090), (10, 20440072), (16, 12775045), (20, 10220036), (40, 5110018), (80, 2555009)]