20128520

素因数分解:

$2^3\times 5^1\times {\mathrm{503213}}^1$

素因数の和:503224

約数の個数: 16

約数和(自身を含む): 45289260

約数和(自身を除く): 25160740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 503213, 1006426, 2012852, 2516065, 4025704, 5032130, 10064260, 20128520]

約数ペア:

[(1, 20128520), (2, 10064260), (4, 5032130), (5, 4025704), (8, 2516065), (10, 2012852), (20, 1006426), (40, 503213)]