8040400

素因数分解:

$2^4\times 5^2\times {\mathrm{20101}}^1$

素因数の和:20119

約数の個数: 30

約数和(自身を含む): 19318022

約数和(自身を除く): 11277622

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 20101, 40202, 80404, 100505, 160808, 201010, 321616, 402020, 502525, 804040, 1005050, 1608080, 2010100, 4020200, 8040400]

約数ペア:

[(1, 8040400), (2, 4020200), (4, 2010100), (5, 1608080), (8, 1005050), (10, 804040), (16, 502525), (20, 402020), (25, 321616), (40, 201010), (50, 160808), (80, 100505), (100, 80404), (200, 40202), (400, 20101)]