4080400

素因数分解:

$2^4\times 5^2\times {\mathrm{101}}^2$

素因数の和:220

約数の個数: 45

約数和(自身を含む): 9901183

約数和(自身を除く): 5820783

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 101, 200, 202, 400, 404, 505, 808, 1010, 1616, 2020, 2525, 4040, 5050, 8080, 10100, 10201, 20200, 20402, 40400, 40804, 51005, 81608, 102010, 163216, 204020, 255025, 408040, 510050, 816080, 1020100, 2040200, 4080400]

約数ペア:

[(1, 4080400), (2, 2040200), (4, 1020100), (5, 816080), (8, 510050), (10, 408040), (16, 255025), (20, 204020), (25, 163216), (40, 102010), (50, 81608), (80, 51005), (100, 40804), (101, 40400), (200, 20402), (202, 20200), (400, 10201), (404, 10100), (505, 8080), (808, 5050), (1010, 4040), (1616, 2525)]