80440400

素因数分解:

$2^4\times 5^2\times {\mathrm{201101}}^1$

素因数の和:201119

約数の個数: 30

約数和(自身を含む): 193259022

約数和(自身を除く): 112818622

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 201101, 402202, 804404, 1005505, 1608808, 2011010, 3217616, 4022020, 5027525, 8044040, 10055050, 16088080, 20110100, 40220200, 80440400]

約数ペア:

[(1, 80440400), (2, 40220200), (4, 20110100), (5, 16088080), (8, 10055050), (10, 8044040), (16, 5027525), (20, 4022020), (25, 3217616), (40, 2011010), (50, 1608808), (80, 1005505), (100, 804404), (200, 402202), (400, 201101)]